AIC2364 Datasheet, PDF (1/12 Pages) Analog Intergrations Corporation – 4A Synchronous PWM/PSM Step-Down

AIC2364
4A Synchronous PWM/PSM Step-Down
Converter with Light Load Efficiency
 ^FEATURES
 ^DESCRIPTION
 2.5V to 6V Input Voltage Range
The AIC2364 is a low-noise, pulse-width-
 Adjustable Output Voltage from 0.8V to
modulated (PWM), DC-DC step-down converter.
Vin
The device features an internal synchronous
 4.0A Guaranteed Output Current
rectifier for high efficiency; it requires no external
 Up to 95% Efficiency on Heavy Load
Schottky diode. The AIC2364 is ideally suited for
(Vin=3.3V, Vout=2.5V, Iout=2.0A)
Li-Ion battery applications. PWM/PSM mode
 Up to 94% Efficiency on Moderate Load
extends battery life and enhance efficiency by
(Vin=3.3V, Vout=2.5V, Iout=200mA)
switching to a pulse-skipping-modulated mode
 Up to 93% Efficiency on Light Load
during light loads. Shutdown mode places the
(Vin=3.3V, Vout=2.5V, Iout=20mA)
 Low R_DS(ON) Internal Switches: 70mΩ
 No Schottky Diode Required
device in standby, reducing supply current to
under 2µA.
Other features of the AIC2364 include high
 100% Duty Cycle in Low Dropout Operation
efficiency for all load range, low dropout voltage,
 Optional 550KHz/1.2MHz Operating Fre-
short circuit protection, over temperature
quency
protection, and over voltage protection. It is
 Optional Programmable Soft-Start (in DFN-
available in SOP-8 and DFN-12 packages.
12) or Internal Fixed 1ms Soft-Start (in SOP-
8)
 Optional Power Good Monitor (Only in DFN-
12 Package)
 SCP, OTP, OVP
 ^APPLICATIONS
 ^{LCD TV}
 ^{Multi-function Peripheral}
 ^{Cellular Phones}
 CPU I/O Supplies
 PDAs and Handy-Terminals
 Battery-Operated Devices (1 Li-Ion or 3
NiMH/ NiCd).
 ^{APPLICATIONS CIRCUIT}
Vin
5.5V
R1
10
C1
10uF
C2
0.1uF
8
VIN
LX
7
1
VCC
FB
4
ON
5
OFF
EN
REF
2
6
PGND
GND
3
A^AI^IC^C2²³3⁶6³4
L1
2.2uF
R2
50k
C4 ^R3
0.1uF ^16k
Vout
3.3V
C3
22uF
Analog Integrations Corporation
Si-Soft Research Center
3A1, 1, Li-Hsin 1^st Rd., Science Park, Hsinchu 300, Taiwan, R.O.C.
TEL: [phone]
FAX: [phone]
DS-2364G-01 20130111
www.analog.com.tw
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