Document
AIC2363
3.2A 550k/1.1MHz Synchronous PWM/PSM
Step-Down Converter with High Light-load Efficiency
FEATURES
DESCRIPTION
2.5V to 6V Input Voltage Range
The AIC2363 is a low-noise, pulse-width-
Adjustable Output Voltage from 0.8V to Vin
modulated (PWM), DC-DC step-down converter.
3.2A Guaranteed Output Current
The device features an internal synchronous
88% Efficiency at Heavy Load
rectifier for high efficiency; it requires no external
(Vin=5V, Vout=3.3V, Iout=3.2A)
Schottky diode. The AIC2363 is ideally suited for
95% Efficiency at Moderate Load
Li-Ion battery applications. Automatic PWM/PSM
(Vin=5V, Vout=3.3V, Iout=1.5A)
mode extends battery life and enhance
91% Efficiency at Light Load
efficiency by switching to a pulse-skipping-
(Vin=5V, Vout=3.3V, Iout=50mA) Low RDS(ON) Internal Switches: 110mΩ
modulated mode during light load. Shutdown mode places the device in standby, reducing
No Schottky Diode Required
supply current to under 2µA.
100% Duty Cycle in Low Dropout Operation
Other features of the AIC2363 include high
Fixed 550k/1.1MHz Operating Frequency
efficiency for all load range, low dropout voltage,
Optional Soft-Start Internal Fixed 1ms Soft-
short circuit protection, and over temperature
Start (in SOP-8)
protection.
APPLICATIONS
LCD TV Portable Products Wireless and DSL Modems Solid-State Drives
Battery-Operated Devices (1 Li-Ion or 3
NiMH/ NiCd)
Analog Integrations Corporation
Si-Soft Research Center 3A1, 1 Li-Hsin 1st Rd., Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: 886-3-5772500
FAX: 886-3-5772510
DS-2363G-04 20140219 www.analog.com.tw
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APPLICATIONS CIRCUIT
VIN 5V
C1 10uF
R1 R4 10Ω 100KΩ
PG
C2 0.1uF
ON OFF
1 VIN 8 EN 7 PGOOD 2 VCC 9 PGND
AIC2363
LX FB REF SS GND
10 5 3 6 4
AIC2363
L1 2.2uH
R2 50KΩ
C5 0.22uF
C4 0.1uF
R3 16KΩ
VOUT 3.3V
C3 22uF
Fig. 1 Typical Application Circuit for DFN-10 Package
VIN
8 VIN
LX 7
L1 2.2uH
5V
R1 10Ω
1 VCC
FB 4
5 ON OFF
EN
REF 2
C2 C1 0.1uF
6 PGND GND 3
10uF AIC2363
C4 0.1uF
VOUT R2 3.3V 50kΩ
R3 16kΩ C3
22uF
Fig. 2 Typical Application Circuit for SOP-8 Package
2
AIC2363
PIN CONFIGURATION
AIC2363XXXXXX
PACKING TYPE TR: TAPE & REEL TB: TUBE(For SOP-8 Package) BG: BAG(For DFN-10 Package)
PACKAGE TYPE R8: SOP-8 with Exposed Pad DC: DFN-10 with Exposed Pad
G: Green Package
A: 1.1MHz B: 550kHz
PIN CONFIGURATION
DFN-10 (3x3) with Exposed Pad (heat sink) TOP VIEW
VIN 1
10 LX
VCC 2
9 PGND
REF 3
Exposed Pad
8 EN
GND 4
7 PGOOD
FB 5
6 SS
Note: The exposed pad must be connected with GND pin.
SOP-8 with Exposed Pad (heat sink) TOP VIEW
Example: AIC2363AGDCTR Fixed 1.1MHz Operating Frequency in Green DFN-10 with Exposed Pad Package and Tape & Reel Packing Type
VCC 1 REF 2 GN D 3 FB 4
Exposed Pad
8 VIN 7 LX 6 PGND 5 EN
Note: The exposed pad must be connected with GND pin.
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AIC2363
ABSOLUTE MAXIMUM RATINGS
Supply Input Volatge, VCC, VIN
-0.3V to 6.5V
LX Pin Switch Voltage
-0.3V to (VIN + 0.3V)
Other I/O Pin Voltage
-0.3V to (VCC + 0.3V)
PGND to GND
+/-0.3 V
Operating Ambient Temperature Range TA
-40C to 85C
Operating Maximum Junction Temperature TJ
150C
Storage Temperature Range TSTG
-65C to 150C
Lead Temperature (Soldering 10 Sec.)
260C
Thermal Resistance Junction to Case SOP-8 (Exposed Pad) *
15C/W
Thermal Resistance Junction to Case DFN 10L (Exposed Pad)*
20C/W
Thermal Resistance Junction to Ambient SOP-8 (Exposed Pad)*
60C/W
Thermal Resistance Junction to Ambient DFN 10L (Exposed Pad)*
50C/W
Latch-Up
200mA
HBM (Human Body Mode)
4KV
(Assume no Ambient Airflow)
Absolute Maximum Ratings are those values beyond which the life of a device may be impaired.
* The package is placed on a two layers PCB with 2 ounces copper and 2 square inch, connected by 8 vias.
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AIC2363
ELECTRICAL CHARACTERISTICS
(TA=25C, VIN=3.3V, unless otherwise specified.) (Note1)
PARAMETER
CONDITIONS
Input Voltage Range
Under Voltage Lockout Threshold Output Adjustment Range
VCC Rising VCC Falling
Shutdown Current Quiescent Current (SOP-8 Package)
VEN = 0V IOUT = 0A, VFB = 1V No Switching
Quiescent Current (DFN-10 Package)
IOUT = 0A, VFB = 1V No Switching
Standby Current
IOUT = 0A, Switching
SYMBOL VIN
VUVLO(R) VUVLO(F)
VOUT ISD
IQ
IQ
ISB
MIN 2.5
0.8
TYP
2.3 2.1
1 200
300 600
MAX 6
VIN 2
UNITS V V
V V A
380 A
480 A 900 A
Feedback Reference Voltage VOUT Line Regulation FB Leakage Current EN Supply Current En Logic High
VIN = 2.5V to 5.5V
VREF
0.784 0.8 0.816
V
ΔVOUT
-2
2%
IFB 0.1 0.2 A
IEN 3.5 A
1.5 VCC V
EN Logic Low
0 0.5 V
P-Channel On-Resistance N-Channel On-Resistance Switch Leakage Current Peak Inductor Current
ILX = 0.2A ILX = 0.2A VEN = 0V, VIN = 5.5V
RDSH(ON) RDSL(ON)
IPK 4
110 80 0.1 5
m m 1 A A
Oscillator Frequency (A Version)
fOSCA
920 1100 1280 kHz
Oscillator Frequency (B Version) Maximum Duty Cycle Thermal Shutdown Trip Point Thermal Shutdown Hysteresis PGood Le.