Datasheet Texas Instruments TPS51427RHBT — 数据表

TPS51427
www.ti.com. SLUS819B – APRIL 2008 – REVISED SEPTEMBER 2008 DUAL D-CAP™ SYNCHRONOUS STEP-DOWN CONTROLLER
FOR NOTEBOOK POWER RAILS
FEATURES 1 DESCRIPTION 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
23 The TPS51427 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
TPS51427
includes
two …