AS1301 Step-Up Converter IC

Inductorless Boost Converter, Low-Noise, 5V/50mA

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Description

The AS1301 is a 50mA inductorless boost converter using a double H-bridge charge-pump topology with two small (≤220nF) 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.

Key Features

Up to 92% Efficiency
2.7V 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

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.