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AIC1610/AIC1611
High Efficiency Synchronous Step-Up DC/DC Converter
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) 20A Quiescent Supply Current. 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
DESCRIPTION
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 quiescent current. These devices offer a built-in 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 voltage. 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) 3-Cell of or 0.65A (AIC1611) for design flexibility.
APPLICATIONS
Palmtop & Notebook Computers. PDAs Wireless Phones Pocket Organizers. Digital Cameras. Hand-Held Devices with 1 to NiMH/NiCd Batteries.
TYPICAL APPLICATION CIRCUIT
VIN + 47F OFF SHDN AIC1610 AIC1611 Low Battery Detection LBI REF 0.1F GND LX OUT + 47F 22H Output 3.3V, 5.0V or Adj. (1.8V to 5.5V) up to 300mA
ON
LBO FB
Low-battery Detect Out
Analog Integrations Corporation
Si-Soft Research Center 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
DS-1610P-03 010405
1
AIC1610/AIC1611
ORDERING INFORMATION
AIC1610XX XX AIC1611XX XX
PACKING TYPE TR: TAPE & REEL PACKAGING TYPE O: MSOP-8 C: COMMERCIAL P: LEAD FREE COMMERCIAL
PIN CONFIGURATION
TOP VIEW
FB 1
8 7 6 5
OUT LX
LBI 2 LBO 3 REF 4
GND
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 Switch Current (LX) Output Current (OUT) Operating Temperature Range Maximum Junction Temperature Storage Temperature Range Lead Temperature (Soldering 10 Sec.) 8.0V VOUT+ 0.3V 6.0V VOUT+0.3V -1.5A to +1.5A -1.5A to +1.5A -40C ~ +85C 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
Minimum Input Voltage Operating Voltage Start-Up Voltage Start-Up Voltage Tempco Output Voltage Range Output Voltage
TEST CONDITIONS
MIN.
TYP.
0.7
MAX.
UNIT
V
1.1 RL=3K (Note2) 0.8 -2 VINAIC1610 1.8 3.17 300 150 180 90 1.199 3.3 350 300 230 160 1.23 0.024 IREF = 0 to 100A VOUT = 1.8V to 5.5V 1.199 ILX = 100mA AIC1610 AIC1611 VLX=0V~4V; VOUT=5.5V VFB = 1.4V , VOUT = 3.3V
SHDN = GND
5.5 1.1
V V mV/C
5.5 3.43 V
Steady State Output Current (Note 3)
(VOUT =3.3V) AIC1611 FB=GND
(VOUT
AIC1610 AIC1611
mA
=5.0V)
Reference Voltage Reference Voltage Tempco Reference Load Regulation Reference Line Regulation FB , LBI Input Threshold Internal switch On-Resistance LX Switch Current Limit LX Leakage Current Operating Current into OUT (Note 4) Shutdown Current into OUT Efficiency
IREF= 0
1.261
V mV/C
10 5 1.23 0.3 0.80 0.50 1.0 0.65 0.05 20 0.1 90 85
30 10 1.261 0.6 1.25 0.85 1 35 1
mV mV/V V A A A A %
VOUT= 3.3V ,ILOAD = 200mA VOUT = 2V ,ILOAD = 1mA
3
AIC1610/AIC1611
ELECTRICAL CHARACTERISTICS (Continued)
PARAMETER
LX Switch On-Time LX Switch Off-Time FB Input Current LBI Input Current
SHDN Input Current LBO Low Output Voltage LBO Off Leakage Current
TEST CONDITIONS
VFB =1V , VOUT = 3.3V VFB =1V , VOUT = 3.3V VFB = 1.4V VLBI = 1.4V V SHDN = 0 or VOUT VLBI = 0, ISINK = 1mA V LBO = 5.5V, VLBI = 5.5V
MIN.
2 0.6
TYP.
4 0.9 0.03 1 0.07 0.2 0.07 50
MAX.
7 1.4 50 50 50 0.4 1
UNIT
S S nA nA nA A
LBI Hystereisis
SHDN Input Voltage
mV 0.2VOUT V
VIL VIH 0.8VOUT
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
160 140 120 100 80 60 40 20 0 0.0 0.5
Shutdown Current Current (A)
Input Battery Current (A)
0.4
VOUT=5V (FB=GND)
0.3
0.2
0.1
VOUT=3.3V (FB=OUT)
Input battery voltage (V) No-Load Battery Current vs. Input Battery
0.5 1.0 1.5 2.0 2.5 3.0 3.5
0.0
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
Supply Voltage (V)
Fig. 1
1.8 1.6
Fig. 2
CCM/DCM Boundary Output Current (mA)
400 350 300 250 200 150 100 50
0 0.5
Shutdown Current vs. Supply Voltage
Start-Up Voltage (V)
1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 0.01
VOUT=5.0V (FB=GND)
L=22H CIN=100F COUT=100F
VOUT=3.3V (FB=OUT) VOUT=5.0V (FB=GND)
VOUT=3.3V (FB=OUT)
0.1
1
10
100
Output Current (mA) Fig. 3
100 90 80
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Input Voltage (V)
Start-Up Voltage vs. Output Current
220 200 180
Fig. 4
Turning Point between CCM & DCM
AIC1610 (ILIMIT =1A)
Ripple Voltage (mV)
Efficiency (%)
70 60 50 40 30 20 10 0 0.01 0.1
VIN=1.2V VIN=2.4V VIN=3.6V VOUT=5.0V (FB=GND) AIC1610 (ILIMIT =1A)
1 10 100 1000
160 140 120 100 80 60 40 20 0 0 50 100 150 200 250 300 350 400 450 500 550 600 650
VIN=3.6V
VIN=2.4V VIN=1.2V
VOUT=5.0V L=22H CIN=47F COUT=47F
Output Current (mA)
Output Current (mA)
Fig. 5
Efficiency vs. Load Current (ref. to Fig.33)
Fig. 6
Ripple Voltage (ref. to Fig.33)
5
AIC1610/AIC1611
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
240
100
AIC1610 (ILIMIT =1A)
200
90 80
Ripple Voltage (mV)
VIN=3.6V VIN=2.4V VIN=1.2V
160
Efficiency (%)
VIN=3.6V VIN=2.4V
VOUT=5.0V L=22H CIN=100F COUT=100F
400 500 600 700 800
70 60 50 40 30 20 10 0 0.01 0.1
120
80
VOUT=5.0V (FB=GND) AIC1611 (ILIMIT =0.65A)
1 10 100 1000
40
VIN=1.2V
0 0 100 200 300
Output Current (mA)
Output Current (mA)
Fig. 7
160 140 120 100 80 60 40
Ripple Voltage (ref. to Fig.33)
Fig. 8
120
Efficiency vs. Load Current (ref. to Fig.33)
VIN=3.6V
AIC1611 (ILIMIT =0.65A)
100
VIN=3.6V
AIC1611 (ILIMIT =0.65A)
Ripple Voltage (mV)
Ripple Voltage (mV)
80
60
VIN=2.4V VIN=1.2V
20 0 0 50 100 150 200 250 300 350
VOUT=5.0V L=22H CIN=47F COUT=47F
400 450 500 550
40
VIN=2.4V VIN=1.2V
0 100 200 300
20
VOUT=5.0V L=22H CIN=100F COUT=100F
400 500 600
0
Output Current (mA)
Output Current (mA)
Fig. 9
100 90 80 70 60 50 40 30 20 10 0 0.01 0.1
Ripple Voltage (ref. to Fig.33)
260 240 220
Fig. 10
Ripple Voltage (ref. to Fig.33)
AIC1610 (ILIMIT =1A)
Ripple Voltage (mV)
(V) Efficiency (%)
VIN=1.2V VIN=2.4V
200 180 160 140 120 100 80 60 40 20
VIN=2.4V
VOUT=3.3V L=22H CIN=47F COUT=47F
300 350 400 450 500 550 600
VOUT=3.3V (FB=OUT) AIC1610 (ILIMIT =1A)
1 10 100 1000
VIN=1.2V
0 0 50 100 150 200 250
Output Current (mA)
Output Current (mA)
Fig. 11
Efficiency vs. Load Current (ref. to Fig.32)
Fig. 12
Ripple Voltage (ref. to Fig.32)
TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 6
AIC1610/AIC1611
100 140 120
AIC1610 (ILIMIT =1A)
90 80
Ripple Voltage (mV)
100 80 60 40 20
0 0
VIN=1.2V
VIN=2.4V
Efficiency (%)
70 60 50 40 30 20 10
VIN=1.2V
VIN=2.4V
AIC1610 (ILIMIT =1A)
50 100 150 200 250 300 350
VOUT=3.3V CIN=100F COUT=100F
400 450 500 550
VOUT=3.3V (FB=OUT) AIC1611 (ILIMIT =0.65A)
1 10 100 1000
0 0.01
Output Current (mA)
Output Current (mA)
Fig. 13
140
Ripple Voltage (ref. to Fig.32)
Fig. 14
120
Efficiency vs. Load Current (ref. to Fig.32)
AIC1611 (ILIMIT =0.65A)
120
110 100
AIC1611 (ILIMIT =0.65A)
Ripple Voltage (mV)
100
Ripple Voltage (mV)
90 80 70 60 50 40 30 20 10 0
80
VIN=2.4V
60 40
20
VIN=1.2V
VOUT=3.3V L=22H CIN=47F COUT=47F
200 250 300 350 400 450 500
VIN=2.4V
VOUT=3.3V L=22H CIN=100F COUT=100F
200 250 300 350 400 450 500
VIN=1.2V
0 50 100 150
0 0 50 100 150
Output Current (mA)
Output Current (mA)
Fig. 15
1.26
Ripple Voltage (ref. to Fig.32)
0.50 0.45
Fig. 16
Ripple Voltage (ref. to Fig.32)
1.25
P-Channel
0.40
Reference Voltage (V)
1.24
Resistance ()
0.35 0.30 0.25 0.20 0.15 0.10
1.23
N-Channel
1.22
1.21
IREF=0
1.20 -40 -20 0 20 40 60 80
0.05 0.00 -60
VOUT=3.3V ILX=100mA
-40 -20 0 20
40
60
80
100
Temperature (C)
Temperature (C)
Fig. 17
Reference Voltage vs. Temperature
Fig. 18
Switch Resistance vs. Temperature
7
AIC1610/AIC1611
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
800 900
Maximum Output Current (mA)
700 600 500 400 300 200 100 0
VOUT=3.3V (FB=OUT) AIC1610 (ILIMIT=1A)
Maximum Output Current (mA)
800 700 600 500 400 300 200 100 0
VOUT=5.0V (FB=GND) AIC1610 (ILIMIT=1A)
AIC1611 (ILIMIT=0.65A)
1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0
AIC1611 (ILIMIT=0.65A)
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
Fig. 19
1.2
Input Voltage (V) Maximum Output Current vs. Input Voltage
Fig. 20
160
Input Voltage (V) Maximum Output Current vs. Input Voltage
Switching Frequency fosc (KHz)
AIC1610 (ILIMIT=1A)
1.0
140 120 100 80 60 40 20 0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
VOUT=5.0V
0.8
ILIM (A)
0.6
AIC1611 (ILIMIT=0.65A)
0.4
VOUT=3.3V
0.2
IOUT=100mA
0.0
2.0
2.5
3.0
3.5
4.0
4.5
5.0
Fig. 21
220
Output Voltage (V) Inductor Current vs. Output Voltage
Supply Voltage (V)
Fig. 22
Switching Frequency vs. Supply Voltage
Switching Frequency Fosc (KHz)
200 180 160 140 120 100 80 60 40 20 0 1 10
VIN=1.2V VOUT=3.3V
VIN=2.4V VOUT=3.3V
VIN=2.4V VOUT=3.3V
VIN=2.4V VOUT=5V
VIN=3.6V VOUT=5V
100 1000
Output Current (mA)
Fig. 23
Switching Frequency vs. Output Current
Fig. 24
LX Switching Waveform
8
AIC1610/AIC1611
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
VIN=2.4V VOUT=3.3V Loading=200mA LX Pin Waveform Loading: Inductor Current VIN=2.4V VOUT=3.3V VOUT AC Couple VOUT: AC Couple 1mA 200mA
Fig. 25
Heavy Load Waveform
Fig. 26
Load Transient Response
VIN
VIN=2.0V~3.0V VOUT=3.3V, IOUT=100mA
V SHDN
VOUT
VOUT
VOUT=3.3V CIN=COUT=47F
Fig. 27
Line Transient Response
Fig. 28 Exiting Shutdown
V SHDN
V SHDN
VOUT VOUT=3.3V CIN=COUT=100F
VOUT VOUT=5.0V CIN=COUT=47F
Fig. 29
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 One Shot
+
OUT Q1 LX Q2 C2 0.1F L
OUT C3 47F
VIN 47H + C1 47F
F/ F SQ R One Shot Max. On-Time + + LBI Reference Voltage + Mirror FB REF C4
0.1F
GND
LBO
10
AIC1610/AIC1611
PIN DESCRIPTIONS
PIN 1: FBConnecting 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. 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. PIN 4: REF-
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 quiesThe 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
IOUT(MAX ) = VIN VOUT - VIN ILIM - t OFF VOUT 2xL ............................................................(2)
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.
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 smaller capacitor (down to 47 F with higher ESR) is acceptable for light loads or in applications that can tolerate higher output ripple. 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
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) Where VREF =1.23V and VOUT ranging from 1.8V to 5.5V. The recommended R6 is 240K.
Low-Battery Detection
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:
12
AIC1610/AIC1611
GND directly to the ground plane. Fig. 35 to 37 are the recommended layout diagrams. AIC1610/11. The addition of an extra input capacitor results in a stable output voltage. Fig.38 shows the application circuit with the above features. Fig.39 to Fig.46 are the performances of Fig. 38.
Ripple Voltage Reduction
Two or three parallel output capacitors can significantly improve output ripple voltage of
APPLICATION EXAMPLES
VIN
VIN C1 47F
LX
L 22H LX R1 LBI R2 0.1F C4 GND REF OUT C2 0.1F
C1 47F VOUT C3 47F
L 22H
R1 LBI R2 0.1F C4 GND REF
OUT C2 0.1F
SHDN
VOUT C3 47F
SHDN
R4 100K
R4 100K
LBO
LBO
FB
LOW BATTERY OUTPUT
FB
AIC1610/11 L: TDK SLF7045T-22OMR90 C1, C3: NIPPON Tantalum Capacitor 6MCM476MB2TER
AIC1610/11
LOW BATTERY OUTPUT
L: TDK SLF7045T-22OMR90 C1, C3: NIPPON Tantalum Capacitor 6MCM476MB2TER
Fig. 32. VOUT = 3.3V Application Circuit.
VIN L 22H LX R1 LBI R2 0.1F C4 GND AIC1610/11 SHDN REF LBO FB 100K R4 C1 47F OUT C2 0.1F R5 VOUT C3 47F
Fig. 33. VOUT = 5.0V Application Circuit.
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
(Continued)
Fig. 35. Top layer
Fig. 36. Bottom layer
L1 22H
Fig. 37. Placement
VIN
VIN
+
C1 100F
+
C2 100F
C3 0.1F + 8 OUT LX 7 6 GND 5 SHDN + +
VOUT +
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
R1 R3 R4 R5 100K
C7 0.1F 100F 100F C5 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 90 85 80 60
VIN=3.6V
50
AIC1610 (ILIMIT =1A)
Ripple Voltage (mV)
VIN=3.6V
40
Efficiency (%)
75 70 65 60 55 50 45 40 35 30 0.01 0.1
VIN=2.4V
30
AIC1610 (ILIMIT =1A)
VOUT=5.0V VIN=1.2V
1 10
20
VIN=2.4V VIN=1.2V VOUT=5.0V L=22H
300 400 500 600 700
10
L=22H
0 100 1000 0 100 200
Output Current (mA)
Output Current (mA)
Fig. 39
Efficiency (ref. to Fig.38)
Fig. 40
Ripple Voltage (ref. to Fig.38)
14
AIC1610/AIC1611
APPLICATION EXAMPLES
60 95 90 85 75 70 65 60 55 50 45 40 35 30 25 0.01 80
(Continued)
60
VIN=3.6V
50
AIC1611 (ILIMIT =0.65A)
Ripple Voltage (mV)
VIN=3.6V
40
Efficiency (%)
VIN=2.4V
30
AIC1611 (ILIMIT =0.65A)
VIN=1.2V VOUT=5.0V L=22H
0.1 1 10 100 1000
20
VIN=2.4V
10
VOUT=5.0V L=22H
VIN=1.2V
0 100 200 300
0 400 500
Output Current (mA)
Output Current (mA)
Fig. 41
100 95 90
Efficiency (ref. to Fig.38)
50
Fig. 42
Ripple Voltage (ref. to Fig.38) AIC1610 (ILIMIT =1A)
VIN=2.4V
45 40
Ripple Voltage (mV)
85
Efficiency (%)
80 75 70 65 60 55 50 45 40 0.01 0.1 1 10
35 30 25 20 15 10 5 0
VIN=1.2V
VIN=2.4V VOUT=3.3V L=22H
250 300 350 400 450 500 550 600
AIC1610 (ILIMIT =1A)
VOUT=3.3V L=22H
100 1000
VIN=1.2V
0
50
100
150
200
Output Current (mA)
Output Current (mA)
Fig. 43
100 95 90
Efficiency (ref. to Fig.38)
35
Fig. 44
Ripple Voltage (ref. to Fig.38) AIC1611 (ILIMIT =0.65A)
30
Ripple Voltage (mV)
85
25
Efficiency (%)
80 75 70 65 60 55 50 45 40 0.01 0.1
VIN=2.4V
20
VIN=2.4V
15 10
AIC1611 (ILIMIT =0.65A)
VOUT=3.3V VIN=1.2V
1 10
L=22H
100 1000
5
VIN=1.2V
VOUT=3.3V L=22H
0 0 50 100 150 200 250 300 350 400
Output Current (mA)
Output Current (mA)
Fig. 45
Efficiency (ref. to Fig.38)
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. 1.10 0.05 0.75 0.25 0.13 2.90 4.90 BSC 2.90 0.65 BSC 0.40 0 0.70 6 3.10 0.15 0.95 0.40 0.23 3.10
A
E1
E
A1 A2 b c
AA
D
A2
e
SEE VIEW B
E E1
A
e L
A1
b
WITH PLATING
0.25
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.
c
16

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