TPS61256A Texas instruments

TPS61256A

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TPS61256A

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Описание

The TPS61256A device provides a power supply solution for battery-powered portable applications. Intended for low-power applications, the TPS61256A supports up to 800-mA load current from a battery discharged as low as 2.7V and allows the use of low cost chip inductor and capacitors. With a wide input voltage range of 2.5V to 5.5V, the device supports applications powered by Li-Ion batteries with extended voltage range and delivers a fixed 5.0V output voltage.The TPS61256A operates at a regulated 3.5-MHz switching frequency and enters power-save mode operation at light load currents to maintain high efficiency over the entire load current range. The PFM mode extends the battery life by reducing the quiescent current to 36µA (typ) during light load operation. Input current in shutdown mode is less than 5µA, which maximizes battery life.The TPS61256A offers a very small solution size due to minimum amount of external components. It allows the use of small inductors and input capacitors to achieve a small solution size. During shutdown, the load is completely disconnected from the battery.These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

93% Efficiency at 3.5MHz Operation
36µA Quiescent Current
Wide V_IN Range From 2.5V to 5.5V
I_OUT ≥1000mA at V_OUT = 5.0V, V_IN ≥3.3V
±2% Total DC Voltage Accuracy
Light-Load PFM Mode
True Load Disconnect During Shutdown
Thermal Shutdown and Overload Protection
Only Three Surface-Mount External Components Required
Total Solution Size <35mm²
9-Pin NanoFree^TM (CSP) Packaging

Topology	Boost
Vin (min) (V)	2.5
Vin (max) (V)	5.5
Vout (min) (V)	5
Vout (max) (V)	5
Switch current limit (typ) (A)	2.4
Type	Converter
Regulated outputs (#)	1
Switching frequency (min) (kHz)	3500
Switching frequency (max) (kHz)	3500
Iq (typ) (mA)	0.033
Features	Enable, Light Load Efficiency, Load Disconnect, Synchronous Rectification
Duty cycle (max) (%)	90
Operating temperature range (°C)	-40 to 85
Rating	Catalog