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AX3514 Datasheet

2A Synchronous Step-Down Converter

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AX3514/A/B
1.2MHz, 2A Synchronous Step-Down
Converter
GENERAL DESCRIPTION
The AX3514/A/B is a 1.2MHz constant frequency current mode PWM step-down
converter. It is ideal for portable equipment requiring very high current up to 2A from
single-cell Lithium-ion batteries while still achieving over 90% efficiency during peak load
conditions. The AX3514/A/B also can run at 100% duty cycle for low dropout operation,
extending battery life in portable systems while light load operation provides very low output
ripple for noise sensitive applications. The AX3514/A/B can supply up to 2A output load
current from a 2.6V to 5.5V input voltage and the output voltage can be regulated as low as
0.6V. The high switching frequency minimizes the size of external components while
keeping switching losses low. The internal slope compensation setting allows the device to
operate with smaller inductor values to optimize size and provide efficient operation. The
AX3514/A/B is available in adjustable (0.6V to VIN) output voltage. The device is available in
SOP-8L Pb-free and TDFN-10L packages.
FEATURES
- 2.6V to 5.5V Input Voltage Range
- Output Voltages from 0.6V to VIN
- High Efficiency: Up to 96%
- 1.2MHz Constant Frequency Operation
- Up to 2A Output Current
- No Schottky Diode Required
- Low RDS(ON) Internal Switches: 0.15
- Current Mode Operation for Excellent Line and Load Transient Response
- Current limit, Enable function
- Short Circuit Protect (SCP)
- Build-in Soft Start function
- 1µA Shutdown Current
- SOP-8L Pb-Free and TDFN-10L packages
1/12
AXElite Confidential Materials, do not copy or distribute without written consent .
Rev.1.8 Nov.09, 2011




AXElite

AX3514 Datasheet Preview

AX3514 Datasheet

2A Synchronous Step-Down Converter

No Preview Available !

AX3514/A/B
BLOCK DIAGRAM
SVIN
FB
SGND
REF
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
PVIN
LX
PGND
EN
PIN ASSIGNMENT
The packages of AX3514/A/B are SOP-8L and TDFN-10L; the pin assignment is given by:
EN
PVIN
SVIN
SGND
FB
1
2
3
4
5
10 PGND
9 PGND
AAX(XG83N15D01)14/A 8 LX
7 LX
6 SGND
TDFN-10L (3*3)
SVIN 1
NC 2
SGND 3
FB 4
( Top View )
SOP-8L
8 PVIN
7 LX
6 PGND
5 EN
2/12
AXElite Confidential Materials, do not copy or distribute without written consent .
Rev.1.8 Nov.09, 2011


Part Number AX3514
Description 2A Synchronous Step-Down Converter
Maker AXElite
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