Product Summary

The TPS51125RGET is a cost effective, dual-synchronous buck controller targeted for notebook system power supply solutions. The TPS51125RGET provides 5-V and 3.3-V LDOs and requires few external components. The 270-kHz VCLK output can be used to drive an external charge pump, generating gate drive voltage for the load switches without reducing the main efficiency. The TPS51125RGET supports high efficiency, fast transient response and provides a combined power-good signal. Out-of-Audio mode light-load operation enables low acoustic noise at much higher efficiency than conventional forced PWM operation. The TPS51125RGET operates with supply input voltages ranging from 5.5 V to 28 V and supports output voltages from 2 V to 5.5 V. The TPS51125RGET is available in a 24-pin QFN package. Applications are (1)Notebook Computers; (2)I/O Supplies; (3)System Power Supplies.

Parametrics

TPS51125RGET absolute maximum ratings: (1)Input voltage range, VBST1, VBST2: -0.3 to 36V; VIN: -0.3 to 30V; LL1, LL2: -2.0 to 30V; VBST1, VBST2: -0.3 to 6V; EN0, ENTRIP1, ENTRIP2, VFB1, VFB2, VO1, VO2, TONSEL, SKIPSEL: -0.3 to 6V; (2)Output voltage range, DRVH1, DRVH2: -1.0 to 36V; DRVH1, DRVH2: -0.3 to 6V; PGOOD, VCLK, VREG3, VREG5, VREF, DRVL1, DRVL2: -0.3 to 6V; (3)TJ, Junction temperature range: -40 to 125℃; (4)Tstg, Storage temperature: -55 to 150℃.

Features

TPS51125RGET features: (1)Wide Input Voltage Range: 5.5 V to 28V; (2)Output Voltage Range: 2 V to 5.5 V; (3)Built-in 100-mA 5-V/3.3-V LDO with Switches; (4)Built-in 1% 2-V Reference Output; (5)With/Without Out-of-Audio Mode Selectable Light Load and PWM only Operation; (6) Internal 1.6-ms Voltage Servo Softstart; (7)Adaptive On-Time Control Architecture with Four Selectable Frequency Setting; (8)4500 ppm/ ℃ R DS(on) Current Sensing; (9)Built-In Output Discharge; (10)Power Good Output; (11)Built-in OVP/UVP/OCP; (12)Thermal Shutdown (Non-latch); (13)QFN24 (RGE).

Diagrams

TPS51125RGET pin connection

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
TPS51125RGET
TPS51125RGET

Texas Instruments

DC/DC Switching Controllers Dual-Synch Step- Down Controller

Data Sheet

0-1: $3.28
1-25: $2.77
25-100: $2.50
100-250: $2.30
TPS51125RGETG4
TPS51125RGETG4

Texas Instruments

DC/DC Switching Controllers Dual-Synch Step- Down Cntrlr

Data Sheet

0-135: $2.50
135-250: $2.30
250-500: $2.09
500-1000: $1.75