The LTC3026EDD 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. To allow operation at low input voltages the LTC3026EDD includes a boost converter that provides the necessary headroom for the internal LDO circuitry.
Output current comes directly from the input supply to maximize efficiency. The boost converter requires only a small chip inductor and ceramic capacitor for operation. Additionally, the boosted output voltage of one LTC3026EDD can supply the boost voltage for other LTC3026s, thus requiring a single inductor for multiple LDOs. A user supplied boost voltage can be used eliminating the need for an inductor altogether.
The LTC3026EDD 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 LTC3026EDD is available in a small 10-lead MSOP or low profile (0.75mm) 10-lead 3mm × 3mm DFN package.
FeaturesLTC3026Integrated boost converterLTC3026-1Boost converter internally disabled and required an external 5V supply to operateFeature
- Input Voltage Range:
- 1.14V to 3.5V (with Boost Enabled)
- 1.14V to 3.5V (with Boost Enabled)
- 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 = 950µA at VIN = 1.5V
- Low Shutdown Current:
- IIN < 1µA (Typ)
- IBST = 0.1µA (Typ)
- Stable with 10µF or Greater Ceramic Capacitors
- Short-Circuit, Reverse Current Protected
- Overtemperature Protected
- Available in 10-Lead MSOP and 10-Lead (3mm × 3mm) DFN Packages
Applications
- High Efficiency Linear Regulator
- Post Regulator for Switching Supplies
- Microprocessor Supply
(Picture: Pinout)
