The LTC ®3453 is a synchronous buck-boost DC/DC converter optimized for driving up to 4 white LEDs at a combined current of up to 500mA from a single Li-Ion battery input.
The LTC3453 is a synchronous buck‑boost DC/DC converter optimized for driving up to four white LEDs with a combined current of up to 500 mA from a single Li‑ion battery. It operates in buck, boost, or buck‑boost mode over an input range of 2.7 V to 5.5 V and features a typical efficiency of 90 %.
The document includes absolute maximum ratings, electrical characteristics, pin descriptions, typical performance curves, and application guidelines such as inductor selection and LED failure handling. Package information specifies a 16‑lead (4 mm × 4 mm) QFN with an exposed pad for thermal performance.
| Input Supply Voltage | 2.7 V to 5.5 V |
|---|---|
| Maximum LED Output Current | 500 mA |
| Shutdown Current | 6 µA |
| Oscillator Frequency | 1 MHz |
| Package Type | 16‑Lead (4 mm × 4 mm) Plastic QFN |
| Typical Efficiency | 90 % (typical) |
The shutdown current is typically 6 µA.
The converter operates at a constant frequency of 1 MHz.
The device can continuously drive up to 500 mA of LED current.
It is offered in a 16‑lead (4 mm × 4 mm) plastic QFN package.