TPS51427A
www.ti.com . SLUS843B – MAY 2008 – REVISED SEPTEMBER 2008 DUAL D-CAP™ SYNCHRONOUS STEP-DOWN CONTROLLER
FOR NOTEBOOK POWER RAILS
FEATURES 1 Fixed-Frequency Emulated On-Time Control;
Frequency Selectable from Three Options D-CAPв„ў Mode Enables Fast Transient
Response Less than 100 ns Advanced Ramp Compensation Allows Low
Output Ripple with Minimal Jitter Selectable PWM-Only/OOAв„ў/Auto-Skip Modes Wide Input Voltage Range: 5.5 V to 28 V Dual Fixed or Adjustable SMPS:
– 0.7 V to 5.9 V (Channel1)
– 0.5 V to 2.5 V (Channel2) Fixed 3.3-V/5-V, or Adjustable Output 0.7-V to
4.5-V LDO; Capable of Sourcing 100 mA Fixed 3.3-VREF Output Capable of Sourcing
10 mA Temperature Compensated Low-Side RDS(on)
Current Sensing Adaptive Gate Drivers with Integrated Boost
Switch Bootstrap Charge Auto Refresh Integrated Soft Start, Tracking Soft Stop Independent PGOOD and EN for Each Channel OOB Function Disabled. Refer to TPS51427 for
OOB-Enabled Device
23 APPLICATIONS DESCRIPTION
The TPS51427A is a dual synchronous step-down
controller designed for notebook and mobile
communications applications. This device is part of a
low-cost suite of notebook power bus regulators that
enables system designs with low external component
counts.
The
TPS51427A …
