Data Sheet
AS1301
5V/50mA Low Noise Inductorless Boost Converter
1 General Description
2 Key Features
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Up to 92% Efficiency
The AS1301 is a 50mA inductorless boost converter
using a double H-bridge charge-pump topology with two
external flying capacitors.
2.7 to 5.25V Input Voltage
Regulated 5V Output
The AS1301 runs on a 1MHz fixed frequency and is
utilized with a low noise regulation scheme to allow
usage together with sensitive RF circuitry from the same
battery supply.
Automatic Mode Up-Switching
<5µA Shutdown Current
5V Tolerant Enable Signal
Up to 50mA Load Current
Overload Protection
Designed to reside in portable and space limited
equipment the 1MHz charge pump converts a 2.7 to
5.25V input to regulated 5V output with 5% accuracy.
Output Disconnected During Shutdown
Soft Start
The shutdown function reduces the supply current to
<5µA and disconnects the load from the output. The
integrated soft-start circuitry prevents current spikes
being drawn from the battery during start-up.
No Inductor Required
Small External Components Required
The AS1301 is available in TDFN (3x3x0.8mm) 10-pin
and WL-CSP 8-bumps packages.
(COUT ≤2.2µF, CFLY ≤220nF)
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Low Noise Fixed Frequency 1MHz Charge Pump:
- 1:1 Battery Feed Through Mode
- 2:3 Single Phase Mode
- 1:2 Dual Phase Mode
Package Options:
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- TDFN (3x3x0.8mm) 10-pin
- WL-CSP 8-bumps with 0.5mm pitch
3 Applications
The device is ideal for dual/triple AA cells or single Li-Ion
battery cell to 5V conversion, mobile phones, portable
instruments, microprocessor based systems, remote
data-acquisition systems, inductorless DC-DC
conversion.
Figure 1. Block Diagram
CFLY1
C1+
CFLY2
C2+
C2-
C1-
5V Supply
VBATT
VBATT
VOUT
GND
+
CBAT
COUT
2.2µF
2.2µF
AS1301
On
Off
EN
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