1.5A Low Input Voltage VLDO Linear Regulator

The LTC3026-1 is a very low dropout (VLDO™) linear regulator that can operate at input voltages down to 1.14V. The device is capable of supplying 1.5A of output current with a typical dropout voltage of only 100mV. Output current comes directly from the input supply to maximize efficiency.

The LTC3026-1 is the same as the LTC3026 but has the boost converter internally disabled. With the boost converter disabled, the SW pin of the LTC3026 is replaced with a ground pin and the BST pin is replaced with a BIAS pin that requires an external 5V supply for operation.

The LTC3026-1 regulator is stable with 10μF or greater ceramic output capacitors. The device has a low 0.4V reference voltage which is used to program the output voltage via two external resistors. The device also has internal current limit, overtemperature shutdown, and reverse output current protection. The LTC3026-1 is available in a small 10-lead MSOP or low profile (0.75mm) 10-lead 3mm × 3mm DFN package.

Features

LTC3026

Integrated boost converter

LTC3026-1

Boost converter internally disabled and requires an external 5V supply to operate

Applications

* High Efficiency Linear Regulator

* Post Regulator for Switching Supplies

* Microprocessor Supply

* Input Voltage Range: 1.14V to 5.5V

* Low Dropout Voltage: 100mV at IOUT = 1.5A

* Adjustable Output Range: 0.4V to 2.6V

* Output Current: Up to 1.5A

* Excellent Supply Rejection Even Near Dropout

* Shutdown Disconnects Load from VIN and VBST

* Low Operating Current:

* IIN = 95μA at VIN = 1.5V

* IBIAS = 175μA at VBIAS = 5V