LM26001 Datasheet | National Semiconductor

Description The LM26001 is a switching regulator designed for the high efficiency requirements of applications with stand-by modes. The device features a low-current sleep mode to maintain efficiency under light-load conditions and current-mode control for accurate regulation over a wide input voltage range. Quiescent current is reduced to 10 µA typically in shutdown mode and less than 40 µA in sleep mode. Forced PWM mode is also available to disable sleep mode. The LM26001 can deliver up to 1.5A of continuous load current with a fixed current limit, through the internal N-channel switch. The part has a wide input voltage range of 4.0V to 38V and can operate with input voltages as low as 3V during line transients. Operating frequency is adjustable from 150 k Hz to 500 k Hz with a single resistor and can be synchronized to an external clock. Other features include Power good, adjustable soft-start, enable pin, input under-voltage protection, and an internal bootstrap diode for reduced ponent count. Features n n n n n n n n n n n n n n High efficiency sleep mode 40 µA typical Iq in sleep mode 10 µA typical Iq in shutdown mode 3.0V minimum input voltage 4.0V to 38V continuous input range 1.5% reference accuracy Cycle-by-cycle current limit Adjustable Frequency (150 k Hz to 500 k Hz) Synchronizable to an external clock Power Good Flag Forced PWM function Adjustable Soft-start TSSOP-16 exposed pad package Thermal Shut Down Applications n n n n n Automotive Telematics Navigation systems In-Dash Instrumentation Battery Powered Applications Stand-by power for home gateways/set-top boxes Typical Application Circuit © 2006 National Semiconductor Corporation DS201794 .national. Connection Diagram Top View 16-Lead Plastic TSSOP Ordering Information Order Number LM26001MXA LM26001MXAX Package Type TSSOP-16EXP TSSOP-16EXP Package Drawing MXA16A MXA16A Package Marking LM26001EM LM26001EM Supplied As 92 Units of Rail 2500 Units of Tape and...