SANYO Semiconductor HOME > Product Information > Applications > Digital cameras: Portable Electronic Devices > Power Supply ICs
Applications
Overview
Portable electronic devices require technologies that achieve stable operation at low input voltages, improved efficiency, and further miniaturization in the power supply system.
We at SANYO Semiconductor makes a point of grasping these needs as early as possible and developing ICs contributing to achieve improved system development and high level of integration based on our rich experience in general-purpose product technologies.
A Lineup of Power supply IC for Single-Lens Reflex
Development focused on power supply IC for single-lens reflex DSC (with 2-cell lithium-ion batteries) and strong shipment history of ICs
| Type no. | Type | Input voltage | Output voltage | Channels | Power stages | Package |
|---|---|---|---|---|---|---|
| LA5680T | Multiple power supply | 1.5V to 12V | Programmable externally | 6ch((Step up 4, down 2) | External(NPN, PNP or NMOS, PMOS) | TQFP48J (7×7) |
| LA5683T | Multiple power supply | 1.8V to 8V | Programmable externally | 4ch((Step up 2, down 2) | External(NPN, PNP or NMOS, PMOS) | TSSOP36 (275mil) |
| LA5679T | Multiple power supply | 1.8V to 11V | Programmable externally | 3ch((Step up 1, down 2) | External(NPN, PNP or NMOS, PMOS) | TSSOP36 (275mil) |
| LA5669T | Multiple power supply | 1.8V to 11V | Programmable externally | 3ch | External | TSSOP36 (275mil) |
| LV5603T | Multiple power supply | 3V to 15V | Programmable externally | 6ch((Step up 2, down 4) | External | TQFP48J (7×7) |
| LV5655 | Multiple power supply | 3V to 15V | Programmable externally | 3ch((Step up 1, down 2) | External | SSOP24 (225mil) |
| LV5604T | Multiple power supply | 3V to 15V | Programmable externally | 8ch((Step up 3, down 5) | External | TQFP64J (7×7) |
A Lineup of Power Supply Switching ICs
| Type no. | Package | Input voltage (V) | ||
|---|---|---|---|---|
| Vcc1 | Vcc2 | Vcc3 | ||
| LV5622LP | VCT16(2.6×2.6) | 2.7 to 4.8 | 3 | 3.5 to 5.2 |
| LV5625V | SSOP16(225mil) | 1.45 to 3.4 | 3 | 3.5 to 5.2 |
Step-Up/Down Switching Converter
We also have a line-up of switchable step-up/down converters. With these single-channel devices an external signal can be used to switch between step-up/down operations.
LV5255GP (1ch)
- Use
Step-up/down switching converter - Package
VCT20(3.0mm×3.0mm 0.5mm pitch) - Recommended operating conditions
- Input voltage range
(VIN) 4.5V to 10V
(VDD) 2.9 to 3.1V - Output voltage range
Step-down: 1.0 to 8V
Step-up: 5.3 to 14V - Output current 200mA
- Functions
- Built-in MOS with up-and-down output.
- Synchronous rectification.
- Step-up and step-down can be switched by an external signal.
- Output voltage can be controlled by an external signal with use of 2-line SPI.
- Built-in power supply for Pch gate drive.
- Externally settable built-in soft-start function
- Built-in overheat protection function.
- Oscillation frequency 300kHz to 1.5MHz
The oscillation frequency is settable by an external resistor.
LV5256GP (1ch)
- Use
Step-up/down switching converter - Package
VCT20(3.0mm×3.0mm 0.5mm pitch) - Recommended operating conditions
- Input voltage range
(VIN) 4.5V to 10V
(VDD) 2.9 to 3.1V - Output voltage range
Step-down: 1.0V to Vin (in external mode)
0 to Vin(during tracking operation)
Step-up: 5.3 to 14V - Output current 600mA
- Functions
- Built-in MOS with up-and-down output.
- Synchronous rectification.
- Step-up and step-down can be switched by an external signal.
- Built-in power supply for Pch gate drive.
- Externally settable built-in soft-start function
- Built-in overheat protection function.
- Oscillation frequency 300kHz to 1.5MHz
The oscillation frequency is settable by an external resistor.