AS1301
5V/50mA Low-Noise Inductorless Boost Converter
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
- 2.7 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
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.
