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AX3604 Datasheet Preview

AX3604 Datasheet

Dual High-Efficiency PWM Step-Down DC-DC Converter

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AX3604
Dual High-Efficiency PWM Step-Down
DC-DC Converter
GENERAL DESCRIPTION
The AX3604 is a dual high-efficiency Pulse-Width-Modulated (PWM) step-down
DC-DC converter. It is capable of delivering 1A output current over a wide input voltage
range from 2.5V to 5.5V, the AX3604 is ideally suited for portable electronic devices that
are powered from 1-cell Li-ion battery or from other power sources within the range such
as cellular phones, PDAs and other handheld devices.
Two operational modes are available: PWM/Low-Dropout auto-switch and shutdown
modes. Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction
loss at PWM mode. No external Schottky diode is required in practical application.
The AX3604 enters Low-Dropout mode when normal PWM cannot provide regulated
output voltage by continuously turning on the upper PMOS. The AX3604 enter shutdown
mode and consumes less than 0.1μA when EN pin is pulled low.
The switching ripple is easily smoothed-out by small package filtering elements due
to a fixed operation frequency of 1.5MHz. This along with small TDFN-12L (3x3) package
provides small PCB area application. Other features include soft start, lower internal
reference voltage with 2% accuracy, over temperature protection, and over current
protection.
FEATURES
- 2.5V to 5.5V Input Voltage Range
- Adjustable Output Voltage from 0.6V to VIN
- 1A Output Current/per channel
- High Efficiency : up to 95%
- No Schottky Diode Required
- 1.5MHz Fixed-Frequency PWM Operation
- Small 12-Lead TDFN Package
1/15
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Mar.22, 2013




AXElite

AX3604 Datasheet Preview

AX3604 Datasheet

Dual High-Efficiency PWM Step-Down DC-DC Converter

No Preview Available !

AX3604
BLOCK DIAGRAM
VIN1
FB
0.6V
Soft-Star
+
FB1 -
OSC
-
+Icomp
SLOPE
COMP
SET
Isense
AMP
RESET
PWM
LOGIC
NON-OVERLAP
CONTROL
EN1
VIN2
FB2
Over-Temperature and
Short-Circuit Protection
Enable Logic
Izero
COMP
FB
0.6V
Soft-Star
+
-
OSC
-
+Icomp
SLOPE
COMP
SET
Isense
AMP
RESET
PWM
LOGIC
NON-OVERLAP
CONTROL
Over-Temperature and
Short-Circuit Protection
Enable Logic
Izero
COMP
EN2
LX1
GND1
LX2
GND2
2/15
Axelite Confidential Materials, do not copy or distribute without written consent.
Rev.1.1 Mar.22, 2013


Part Number AX3604
Description Dual High-Efficiency PWM Step-Down DC-DC Converter
Maker AXElite
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