AIC1610/AIC1611 High Efficiency Synchronous Step-Up DC/DC Converter DESCRIPTION FEATURES High Efficiency (9 3 % when VIN=2.4V, VOUT=3.3V, IOUT=200mA) Output Current up to 500mA. (AIC1610 at VIN=2.4V and VOUT=3.3V) The AIC1610/AIC1611 are high efficiency step up DC-DC converters. The start-up voltage is as low as 0.8V with operating voltage down to 0.7V. Simply consuming 20A of qui- 20A Quiescent Supply Current. escent current. These devices offer a built-in Power-Saving Shutdown Mode (0.1A typical). Internal Synchronous Rectifier (No External Diode Required). On-Chip Low Battery Detector. Low Battery Hysteresis Space-Saving Package: MSOP-8 synchronous rectifier that reduces size and cost by eliminating the need for an external Schottky diode and improves overall efficiency by minimizing losses. The switching frequency can range up to 500KHz depending on the load and input volt- APPLICATIONS age. The output voltage can be easily set by Palmtop & Notebook Computers. PDAs Wireless Phones Pocket Organizers. Digital Cameras. Hand-Held Devices with 1 to NiMH/NiCd Batteries. two external resistors from 1.8V to 5.5V, connecting FB to OUT to get 3.3V, or connecting to GND to get 5.0V. The peak current of the internal switch is fixed at 1.0A (AIC1610) 3-Cell or 0.65A (AIC1611) for design flexibility. of TYPICAL APPLICATION CIRCUIT VIN ON + 47F OFF 22H LX SHDN AIC1610 AIC1611 Low Battery Detection LBI REF OUT + 47F LBO GND FB Output 3.3V, 5.0V or Adj. (1.8V to 5.5V) up to 300mA Low-battery Detect Out 0.1F Analog Integrations Corporation Si-Soft Research Center DS-1610P-03 010405 3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C. TEL: 886-3-5772500 FAX: 886-3-5772510 www.analog.com.tw 1 AIC1610/AIC1611 ORDERING INFORMATION PIN CONFIGURATION AIC1610XX XX AIC1611XX XX TOP VIEW PACKING TYPE TR: TAPE & REEL PACKAGING TYPE O: MSOP-8 C: COMMERCIAL P: LEAD FREE COMMERCIAL FB 1 8 OUT LBI 2 7 LX LBO 3 6 GND REF 4 5 SHDN Example: AIC1610COTR In MSOP-8 Package & Taping & Reel Packing Type AIC1610POTR In MSOP-8 Lead Free Package & Taping & Reel Packing Type ABSOLUTE MAXIMUM RATINGS Supply Voltage (OUT to GND) Switch Voltage (LX to GND) SHDN , LBO to GND LBI, REF, FB, to GND 8.0V VOUT+ 0.3V 6.0V VOUT+0.3V Switch Current (LX) -1.5A to +1.5A Output Current (OUT) -1.5A to +1.5A Operating Temperature Range -40C ~ +85C Maximum Junction Temperature Storage Temperature Range Lead Temperature (Soldering 10 Sec.) 125C -65C ~150C 260C Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. TEST CIRCUIT Refer to Typical Application Circuit. 2 AIC1610/AIC1611 ELECTRICAL CHARACTERISTICS (VIN=2.0V, VOUT=3.3V, FB=VOUT, TA=25C, unless otherwise specified.) (Note1) PARAMETER TEST CONDITIONS MIN. Minimum Input Voltage 1.1 RL=3K (Note2) 0.8 Start-Up Voltage Tempco VIN<VOUT 1.8 Output Voltage FB = VOUT 3.17 3.3 AIC1610 300 350 Steady State Output Current (VOUT =3.3V) AIC1611 150 300 (Note 3) FB=GND AIC1610 180 230 (VOUT AIC1611 90 160 1.199 1.23 FB=OUT =5.0V) IREF= 0 Reference Voltage Tempco UNIT V 5.5 V 1.1 V -2 Output Voltage Range Reference Voltage MAX. 0.7 Operating Voltage Start-Up Voltage TYP. mV/C 5.5 3.43 V mA 1.261 0.024 V mV/C Reference Load Regulation IREF = 0 to 100A 10 30 mV Reference Line Regulation VOUT = 1.8V to 5.5V 5 10 mV/V 1.23 1.261 V 0.3 0.6 FB , LBI Input Threshold Internal switch On-Resistance LX Switch Current Limit LX Leakage Current 1.199 ILX = 100mA AIC1610 0.80 1.0 1.25 AIC1611 0.50 0.65 0.85 VLX=0V~4V; VOUT=5.5V 0.05 1 A VFB = 1.4V , VOUT = 3.3V 20 35 A SHDN = GND 0.1 1 A VOUT= 3.3V ,ILOAD = 200mA 90 VOUT = 2V ,ILOAD = 1mA 85 Operating Current into OUT (Note 4) Shutdown Current into OUT Efficiency A % 3 AIC1610/AIC1611 ELECTRICAL CHARACTERISTICS (Continued) PARAMETER TEST CONDITIONS MIN. TYP. MAX. UNIT LX Switch On-Time VFB =1V , VOUT = 3.3V 2 4 7 S LX Switch Off-Time VFB =1V , VOUT = 3.3V 0.6 0.9 1.4 S FB Input Current VFB = 1.4V 0.03 50 nA LBI Input Current VLBI = 1.4V 1 50 nA SHDN Input Current V SHDN = 0 or VOUT 0.07 50 nA LBO Low Output Voltage VLBI = 0, ISINK = 1mA 0.2 0.4 A LBO Off Leakage Current V LBO = 5.5V, VLBI = 5.5V 0.07 1 LBI Hystereisis SHDN Input Voltage 50 VIL VIH mV 0.2VOUT 0.8VOUT V Note 1: Specifications are production tested at TA=25C. Specifications over the -40C to 85C operating temperature range are assured by design, characterization and correlation with Statistical Quality Controls (SQC). Note 2: Start-up voltage operation is guaranteed without the addition of an external Schottky diode between the input and output. Note 3: Steady-state output current indicates that the device maintains output voltage regulation under load. Note 4: Device is bootstrapped (power to the IC comes from OUT). This correlates directly with the actual battery supply. 4 AIC1610/AIC1611 TYPICAL PERFORMANCE CHARACTERISTICS 0.5 Shutdown Current Current (A) Input Battery Current (A) 160 140 120 VOUT=5V (FB=GND) 100 80 60 40 VOUT=3.3V (FB=OUT) 20 0 1.0 1.5 2.0 2.5 3.0 Input battery voltage (V) No-Load Battery Current vs. Input Battery 3.5 0.2 0.1 1.6 VOUT=5.0V (FB=GND) 1.2 1.0 0.8 0.6 VOUT=3.3V (FB=OUT) 0.4 0.2 0.0 0.01 0.1 1 10 100 Output Current (mA) Fig. 3 300 200 5.5 VOUT=5.0V (FB=GND) 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Input Voltage (V) Fig. 4 Ripple Voltage (mV) VIN=1.2V 60 VIN=2.4V VIN=3.6V 30 20 VOUT=5.0V (FB=GND) 10 AIC1610 (ILIMIT =1A) 100 Turning Point between CCM & DCM AIC1610 (ILIMIT =1A) 160 140 VIN=3.6V 120 100 80 VOUT=5.0V L=22H CIN=47F COUT=47F VIN=2.4V 60 40 VIN=1.2V 20 1000 0 0 50 100 Output Current (mA) Fig. 5 5.0 VOUT=3.3V (FB=OUT) 0 0.5 180 10 4.5 50 80 1 4.0 Shutdown Current vs. Supply Voltage 100 200 0.1 3.5 150 220 0 0.01 3.0 250 90 40 2.5 L=22H CIN=100F COUT=100F 350 Start-Up Voltage vs. Output Current 50 2.0 400 100 70 1.5 Fig. 2 1.8 1.4 1.0 Supply Voltage (V) CCM/DCM Boundary Output Current (mA) 0.5 Fig. 1 Start-Up Voltage (V) 0.3 0.0 0.0 Efficiency (%) 0.4 Efficiency vs. Load Current (ref. to Fig.33) 150 200 250 300 350 400 450 500 550 600 650 Output Current (mA) Fig. 6 Ripple Voltage (ref. to Fig.33) 5 AIC1610/AIC1611 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 100 240 AIC1610 (ILIMIT =1A) 90 VIN=3.6V 80 VIN=3.6V 160 Efficiency (%) Ripple Voltage (mV) 200 VIN=2.4V 120 VOUT=5.0V L=22H CIN=100F COUT=100F 80 40 VIN=1.2V 100 200 300 400 500 600 700 VIN=2.4V 60 50 40 VOUT=5.0V (FB=GND) 20 AIC1611 (ILIMIT =0.65A) 10 0 800 0.01 0.1 1 Output Current (mA) Fig. 7 100 1000 Ripple Voltage (ref. to Fig.33) Fig. 8 Efficiency vs. Load Current (ref. to Fig.33) 120 140 VIN=3.6V AIC1611 (ILIMIT =0.65A) 120 100 80 VIN=2.4V 60 VIN=3.6V 100 Ripple Voltage (mV) Ripple Voltage (mV) 10 Output Current (mA) 160 VOUT=5.0V L=22H CIN=47F COUT=47F 40 VIN=1.2V 20 AIC1611 (ILIMIT =0.65A) 80 60 VOUT=5.0V L=22H CIN=100F COUT=100F VIN=2.4V 40 VIN=1.2V 20 0 0 0 50 100 150 200 250 300 350 400 450 500 0 550 100 200 Output Current (mA) Fig. 9 Ripple Voltage (ref. to Fig.33) Fig. 10 100 260 90 240 Ripple Voltage (mV) VIN=1.2V 60 VIN=2.4V 50 40 30 VOUT=3.3V (FB=OUT) 20 AIC1610 (ILIMIT =1A) 10 500 600 Ripple Voltage (ref. to Fig.33) AIC1610 (ILIMIT =1A) 200 180 160 140 VIN=2.4V 120 100 VOUT=3.3V L=22H CIN=47F COUT=47F 80 60 VIN=1.2V 40 20 0.1 1 10 100 1000 0 0 50 100 Output Current (mA) Fig. 11 400 220 70 0 0.01 300 Output Current (mA) 80 (V) Efficiency (%) VIN=1.2V 30 0 0 70 Efficiency vs. Load Current (ref. to Fig.32) 150 200 250 300 350 400 450 500 550 600 Output Current (mA) Fig. 12 Ripple Voltage (ref. to Fig.32) TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 6 AIC1610/AIC1611 100 AIC1610 (ILIMIT =1A) 140 90 80 Efficiency (%) Ripple Voltage (mV) 120 100 VIN=2.4V VIN=1.2V 80 60 VOUT=3.3V CIN=100F COUT=100F 40 20 AIC1610 (ILIMIT =1A) 0 0 50 100 150 200 250 300 350 400 450 VIN=1.2V 70 50 40 30 VOUT=3.3V (FB=OUT) 20 AIC1611 (ILIMIT =0.65A) 10 500 0 0.01 550 1 Output Current (mA) Fig. 13 Ripple Voltage (ref. to Fig.32) Fig. 14 100 1000 Efficiency vs. Load Current (ref. to Fig.32) 120 AIC1611 (ILIMIT =0.65A) AIC1611 (ILIMIT =0.65A) 110 120 100 Ripple Voltage (mV) Ripple Voltage (mV) 10 Output Current (mA) 140 100 80 VIN=2.4V 60 VOUT=3.3V L=22H CIN=47F COUT=47F 40 VIN=1.2V 20 90 80 70 60 VIN=2.4V 50 VOUT=3.3V L=22H CIN=100F COUT=100F 40 30 20 VIN=1.2V 10 0 0 0 50 100 150 200 250 300 350 400 450 500 0 50 100 150 Output Current (mA) Fig. 15 200 250 300 350 400 450 500 Output Current (mA) Ripple Voltage (ref. to Fig.32) Fig. 16 Ripple Voltage (ref. to Fig.32) 0.50 1.26 0.45 1.25 P-Channel 0.40 Resistance () Reference Voltage (V) VIN=2.4V 60 1.24 1.23 1.22 0.35 0.30 N-Channel 0.25 0.20 0.15 VOUT=3.3V ILX=100mA 0.10 1.21 IREF=0 1.20 -40 -20 0 20 40 60 80 0.05 0.00 -60 -40 Fig. 17 Reference Voltage vs. Temperature -20 0 20 40 60 80 100 Temperature (C) Temperature (C) Fig. 18 Switch Resistance vs. Temperature 7 AIC1610/AIC1611 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 900 Maximum Output Current (mA) Maximum Output Current (mA) 800 VOUT=3.3V (FB=OUT) 700 600 AIC1610 (ILIMIT=1A) 500 400 300 200 AIC1611 (ILIMIT=0.65A) 100 0 1.0 1.2 Fig. 19 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 800 600 Input Voltage (V) Maximum Output Current vs. Input Voltage AIC1610 (ILIMIT=1A) 500 400 300 200 AIC1611 (ILIMIT=0.65A) 100 0 3.0 VOUT=5.0V (FB=GND) 700 1.0 1.5 2.5 3.0 3.5 4.0 4.5 Input Voltage (V) Maximum Output Current vs. Input Voltage Fig. 20 1.2 2.0 160 Switching Frequency fosc (KHz) AIC1610 (ILIMIT=1A) 1.0 ILIM (A) 0.8 0.6 AIC1611 (ILIMIT=0.65A) 0.4 0.2 0.0 2.0 2.5 Fig. 21 3.0 3.5 4.0 4.5 5.0 Output Voltage (V) Inductor Current vs. Output Voltage 140 120 VOUT=5.0V 100 80 VOUT=3.3V 60 40 IOUT=100mA 20 0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 Supply Voltage (V) Fig. 22 Switching Frequency vs. Supply Voltage Switching Frequency Fosc (KHz) 220 200 VIN=1.2V VOUT=3.3V 180 160 VIN=2.4V VOUT=3.3V VIN=2.4V VOUT=3.3V 140 120 VIN=2.4V VOUT=5V 100 80 60 40 VIN=3.6V VOUT=5V 20 0 1 10 100 1000 Output Current (mA) Fig. 23 Switching Frequency vs. Output Current Fig. 24 LX Switching Waveform 8 AIC1610/AIC1611 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) LX Pin Waveform VIN=2.4V Loading: VOUT=3.3V 1mA 200mA Inductor Current Loading=200mA VIN=2.4V VOUT=3.3V VOUT: AC Couple VOUT AC Couple Fig. 25 VIN Heavy Load Waveform VIN=2.0V~3.0V Fig. 26 Load Transient Response V SHDN VOUT=3.3V, IOUT=100mA VOUT VOUT VOUT=3.3V CIN=COUT=47F Fig. 27 Line Transient Response Fig. 28 Exiting Shutdown V SHDN V SHDN VOUT VOUT Fig. 29 VOUT=3.3V VOUT=5.0V CIN=COUT=100F CIN=COUT=47F Exiting Shutdown Fig. 30 Exiting Shutdown 9 AIC1610/AIC1611 TYPICAL PERFORMANCE CHARACTERISTICS (Continued) V SHDN VOUT VOUT=5.0V CIN=COUT=100F Fig. 31 Exiting Shutdown BLOCK DIAGRAM SHDN + Minimum Off-Time OUT OUT C3 47F C2 0.1F Q1 One Shot L LX VIN Q2 47H + F/ F S Q C1 47F GND R One Shot Max. On-Time + Mirror + LBO + - FB Reference Voltage REF C4 0.1F LBI 10 AIC1610/AIC1611 PIN DESCRIPTIONS PIN 1: FB- Connecting to OUT to get +3.3V output, connecting to GND to get +5.0V output, or using a resistor network to set the output voltage from +1.8V to +5.5V. PIN 2: LBI- Low-battery comparator input. Internally set at +1.23V to trip. PIN 3: LBO- Open-drain low battery comparator output. Output is low when VLBI is <1.23V. LBO is high impedance during shutdown. PIN 4: REF- 1.23V reference voltage. Bypass with a 0.1F capacitor. PIN 5: SHDN- Shutdown input. High=operating, low=shutdown. PIN 6: GND- Ground PIN 7: LXN-channel and P-channel power MOSFET drain. PIN 8: OUT- Power output. OUT provides bootstrap power to the IC. APPLICATION INFORMATION Overview AIC1610/AIC1611 series are high efficiency, stepup DC-DC converters, designed to feature a built-in synchronous rectifier, which reduces size and cost by eliminating the need for an external Schottky diode. The start-up voltage of AIC1610/AIC1611 is as low as 0.8V and it operates with an input voltage down to 0.7V. Quiescent supply current is only 20A. The internal P-MOSFET on-resistance is typically 0.3 to improve overall efficiency by minimizing AC losses. The output voltage can be easily set by two external resistors from 1.8V to 5.5V, connecting FB to OUT to get 3.3V, or connecting to GND to get 5.0V. The peak current of the internal switch is fixed at 1.0A (AIC1610) or 0.65A (AIC1611) for design flexibility. The current limit of AIC1610 and AIC1611 are 1.0A and 0.65A respectively. The lower current limit allows the use of a physically smaller inductor in space-sensitive applications. cent current. The peak current of the internal NMOSFET power switch can be fixed at 1.0A (AIC1610) or 0.65A (AIC1611). The switch frequency depends on either loading condition or input voltage, and can range up to 500KHz. It is governed by a pair of one-shots that set a minimum off-time (1S) and a maximum on-time (4S). Synchronous Rectification Using the internal synchronous rectifier eliminates the need for an external Schottky diode. Therefore, the cost and board space are reduced. During the cycle of off-time, P-MOSFET turns on and shunts NMOSFET. Due to the low turn-on resistance of MOSFET, synchronous rectifier significantly improves efficiency without an additional external Schottky diode. Thus, the conversion efficiency can be as high as 93%. Reference Voltage PFM Control Scheme The key feature of the AIC1610 series is a unique minimum-off-time, constant-on-time, current-limited, pulse-frequency-modulation (PFM) control scheme (see BLOCK DIAGRAM) with the ultra-low quies- The reference voltage (REF) is nominally 1.23V for excellent T.C. performance. In addition, REF pin can source up to 100A to external circuit with good load regulation (<10mV). A bypass capacitor of 0.1F is required for proper operation and good per- 11 AIC1610/AIC1611 formance Shutdown The whole circuit is shutdown when V SHDN is low. At shutdown mode, the current can flow from battery to output due to body diode of the P-MOSFET. VOUT falls to approximately Vin-0.6V and LX remains high impedance. The capacitance and load at OUT determine the rate at which VOUT decays. Shutdown can be pulled as high as 6V. Regardless of the voltage at OUT. Selecting the Output Voltage VOUT can be simply set to 3.3V/5.0V by connecting FB pin to OUT/GND due to the use of internal resistor divider in the IC (Fig.32 and Fig.33). In order to adjust output voltage, a resistor divider is connected to VOUT, FB, GND (Fig.34). Vout can be calculated by the following equation: R5=R6 [(VOUT / VREF )-1] .....................................(1) VIN VOUT - VIN ILIM - t OFF VOUT 2xL ............................................................(2) IOUT(MAX ) = where IOUT(MAX)=maximum output current in amps VIN=input voltage L=inductor value in H =efficiency (typically 0.9) tOFF=LX switch' off-time in S ILIM=1.0A or 0.65A 2. Capacitor Selection The output ripple voltage relates with the peak inductor current and the output capacitor ESR. Besides output ripple voltage, the output ripple current also needs to be concerned. A filter capacitor with low ESR is helpful to the efficiency and steady state output current of AIC1610 series. Therefore NIPPON tantalum capacitor MCM series with 100F/6V is recommended. A Where VREF =1.23V and VOUT ranging from 1.8V to 5.5V. The recommended R6 is 240K. smaller capacitor (down to 47 F with higher Low-Battery Detection tions that can tolerate higher output ripple. AIC1610 series contains an on-chip comparator with 50mV internal hysteresis (REF, REF+50mV) for low battery detection. If the voltage at LBI falls below the internal reference voltage. LBO ( an open-drain output) sinks current to GND. Component Selection 1. Inductor Selection An inductor value of 22H performs well in most applications. The AIC1610 series also work with inductors in the 10H to 47H range. An inductor with higher peak inductor current tends a higher output voltage ripple (IPEAK xoutput filter capacitor ESR). The inductor's DC resistance significantly affects efficiency. We can calculate the maximum output current as follows: ESR) is acceptable for light loads or in applica- 3. PCB Layout and Grounding Since AIC1610's switching frequency can range up to 500kHz, it makes AIC1610 become very sensitive. So careful printed circuit layout is important for minimizing ground bounce and noise. IC's OUT pin should be as clear as possible. And the GND pin should be placed close to the ground plane. Keep the IC's GND pin and the ground leads of the input and output filter capacitors less than 0.2in (5mm) apart. In addition, keep all connection to the FB and LX pins as short as possible. In particular, when using external feedback resistors, locate them as close to the FB as possible. To maximize output power and efficiency and minimize output ripple voltage, use a ground plane and solder the IC's 12 AIC1610/AIC1611 GND directly to the ground plane. Fig. 35 to 37 AIC1610/11. The addition of an extra input ca- are the recommended layout diagrams. pacitor results in a stable output voltage. Fig.38 shows the application circuit with the above fea- Ripple Voltage Reduction tures. Fig.39 to Fig.46 are the performances of Two or three parallel output capacitors can sig- Fig. 38. nificantly improve output ripple voltage of APPLICATION EXAMPLES VIN VIN C1 47F L 22H L 22H OUT LX R1 C3 47F 0.1F REF LBO C4 GND FB C2 0.1F LBI 0.1F R4 100K REF LBO C4 LOW BATTERY OUTPUT C3 47F SHDN R2 R4 100K VOUT OUT R1 SHDN R2 LX VOUT C2 0.1F LBI C1 47F GND AIC1610/11 FB LOW BATTERY OUTPUT AIC1610/11 L: TDK SLF7045T-22OMR90 C1, C3: NIPPON Tantalum Capacitor 6MCM476MB2TER L: TDK SLF7045T-22OMR90 C1, C3: NIPPON Tantalum Capacitor 6MCM476MB2TER Fig. 32. VOUT = 3.3V Application Circuit. Fig. 33. VOUT = 5.0V Application Circuit. VIN L 22H C1 47F LX VOUT OUT R1 C2 0.1F LBI R2 SHDN 0.1F C4 100K R4 REF LBO GND AIC1610/11 FB C3 47F R5 LOW BATTERY OUTPUT R6 L: TDK SLF7045T-22OMR90 C1, C3: NIPPON Tantalum Capacitor 6MCM476MB2TER VOUT=VREF*(1+R5/R6) Fig. 34 An Adjustable Output Application Circuit 13 AIC1610/AIC1611 APPLICATION EXAMPLES Fig. 35. Top layer (Continued) Fig. 36. Bottom layer L1 VIN + C1 100F VIN + Fig. 37. Placement 22H C3 0.1F C2 100F R1 R3 R4 R5 100K VOUT + + + + C7 0.1F 100F 100F C5 8 OUT LX 7 6 GND 5 SHDN 1 FB 2 LBI R2 R6 3 LBO 4 REF LBI AIC1610/11 LBO C4 100nF R5=0, R6=open; for VOUT=3.3V R5=open, R6=0; for VOUT=5.0V VOUT=1.23(1+R5/R6); for adjustable output voltage C6 C8 100F R7 10k ShutDown L1: TDK SLF7045T-22OMR90 C1~C2, C6~8: NIPPON Tantalum Capacitor 6MCM107MCTER Fig. 38 AIC1610/11 application circuit with small ripple voltage. 100 95 60 AIC1610 (ILIMIT =1A) VIN=3.6V 90 50 Ripple Voltage (mV) 85 Efficiency (%) 80 VIN=2.4V 75 70 65 60 AIC1610 (ILIMIT =1A) 55 50 VOUT=5.0V 45 40 VIN=1.2V 30 20 VIN=2.4V VOUT=5.0V VIN=1.2V 10 L=22H L=22H 35 30 0.01 VIN=3.6V 40 0 0.1 1 10 100 1000 0 100 Output Current (mA) Fig. 39 Efficiency (ref. to Fig.38) 200 300 400 500 600 700 Output Current (mA) Fig. 40 Ripple Voltage (ref. to Fig.38) 14 AIC1610/AIC1611 APPLICATION EXAMPLES (Continued) 60 95 90 60 AIC1611 (ILIMIT =0.65A) VIN=3.6V 50 85 Ripple Voltage (mV) Efficiency (%) 80 75 70 VIN=2.4V 65 60 55 AIC1611 (ILIMIT =0.65A) 50 45 40 35 30 25 0.01 VOUT=5.0V VIN=1.2V 1 10 100 30 20 VIN=2.4V 10 L=22H 0.1 VIN=3.6V 40 0 100 200 Efficiency (ref. to Fig.38) Fig. 42 Ripple Voltage (mV) Efficiency (%) AIC1610 (ILIMIT =1A) 40 80 75 70 VIN=1.2V 65 60 AIC1610 (ILIMIT =1A) VOUT=3.3V 35 30 25 VIN=2.4V 20 15 10 L=22H 45 40 0.01 VOUT=3.3V VIN=1.2V L=22H 5 0 0.1 1 10 100 0 1000 50 100 150 Output Current (mA) Fig. 43 200 250 Efficiency (ref. to Fig.38) Fig. 44 450 500 550 600 AIC1611 (ILIMIT =0.65A) 30 80 Ripple Voltage (mV) 85 Efficiency (%) 400 35 90 VIN=2.4V 75 70 65 AIC1611 (ILIMIT =0.65A) 55 VOUT=3.3V VIN=1.2V 25 20 VIN=2.4V 15 10 VOUT=3.3V VIN=1.2V 5 L=22H 45 40 0.01 350 Ripple Voltage (ref. to Fig.38) 95 50 300 Output Current (mA) 100 60 500 Ripple Voltage (ref. to Fig.38) 45 85 50 400 50 VIN=2.4V 90 55 300 Output Current (mA) 100 95 L=22H 0 1000 Output Current (mA) Fig. 41 VOUT=5.0V VIN=1.2V L=22H 0 0.1 1 10 100 1000 0 50 100 Output Current (mA) Fig. 45 Efficiency (ref. to Fig.38) 150 200 250 300 350 400 Output Current (mA) Fig. 46 Ripple Voltage (ref. to Fig.38) 15 AIC1610/AIC1611 PHYSICAL DIMENSION (unit: mm) MSOP-8 D S Y M B O L MSOP-8 MILLIMETERS MIN. MAX. E E1 A A A SEE VIEW B A1 0.05 0.15 A2 0.75 0.95 b 0.25 0.40 c 0.13 0.23 D 2.90 E A2 e 1.10 E1 2.90 A e L A1 3.10 4.90 BSC 3.10 0.65 BSC 0.40 0.70 0 6 b 0.25 c WITH PLATING BASE METAL SECTION A-A L VIEW B Note: Information provided by AIC is believed to be accurate and reliable. However, we cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AIC product; nor for any infringement of patents or other rights of third parties that may result from its use. We reserve the right to change the circuitry and specifications without notice. Life Support Policy: AIC does not authorize any AIC product for use in life support devices and/or systems. Life support devices or systems are devices or systems which, (I) are intended for surgical implant into the body or (ii) support or sustain life, and whose failure to perform, when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 16