AS1301 Datasheet, PDF (1/16 Pages) ams AG – 5V/50mA Low Noise Inductorless Boost Converter

AS1301
5V/50mA Low Noise Inductorless Boost Converter
Data Sheet
1 General Description
The AS1301 is a 50mA inductorless boost converter
using a double H-bridge charge-pump topology with two
external flying capacitors.
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.
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.
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.
The AS1301 is available in TDFN (3x3x0.8mm) 10-pin
and WL-CSP 8-bumps packages.
Figure 1. Block Diagram
2 Key Features
! Up to 92% Efficiency
! 2.7 to 5.25V Input Voltage
! Regulated 5V Output
! Automatic Mode Up-Switching
! <5µA Shutdown Current
! 5V Tolerant Enable Signal
! Up to 50mA Load Current
! Overload Protection
! Output Disconnected During Shutdown
! Soft Start
! No Inductor Required
! Small External Components Required
(COUT ≤2.2µF, CFLY ≤220nF)
! 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:
- 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.
C_FLY1
C_FLY2
C1+ C1- C2+ C2-
VBATT
+
VBATT
C_BAT
2.2µF
AS1301
VOUT
5V Supply
C_OUT
2.2µF
On
EN
Off
GND
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