Product Summary

The TPS51120RH is a highly sophisticated dual current mode synchronous step-down controller. It is a full featured controller designed to run directly off a three or four-cell Li-ion battery and provide high-power and 5-V and/or 3.3-V standby regulation for all the down-stream circuitry in a notebook computer system. High current, 100-mA, 5-V or 3.3-V on-board linear regulators of TPS51120RH have glitch-free switch over function to SMPS and can be kept alive independently during standby state. The pseudo-constant frequency of TPS51120RH adaptive on-time control scheme supports full range of current mode operation including simplified loop compensation, ceramic output capacitors as well as seamless transition to reduced frequency operation at light-load Reference condition.

Parametrics

TPS51120RH absolute maximum ratings: (1)Input voltage range: VIN, EN5: -0.3 to 30 V, SKIPSEL, TONSEL, EN1, EN2, CS1, CS2, V5FILT, VFB1, VFB2, EN3, VO1, VO2: -0.3 to 6 V; (2)Output voltage range: -1 to 30 V; (3)Source/sink current: 100 mA; (4)Operating ambient temperature range: -40 to 85 ℃; (5)Storage temperature: -55 to 150 ℃; (6)Junction temperature: -40 to 125 ℃; (7)Lead temperature 1.6 mm (1/16 inch) from case for 10 seconds: 255 ℃.

Features

TPS51120RH features: (1)3.3-V and 5-V 100-mA Bootstrapped Standby Regulators with Independent Enables; (2)Selectable D-CAP Mode Enables Fast three Transient; (3)Response Less than 100 ns; (4)Selectable Low Ripple Current Mode; (5)Less than 1% Internal Reference Accuracy; (6)Selectable PWM-only/Auto-skip Modes; (7)Low-side RDS(on) Loss-less Current Sensing; (8)RSENSE Accurate Current Sense Option; (9)Internal Soft-start and Integrated VOUT compen Discharge; (10)Transistors; (11)Integrated 2-V Reference.

Diagrams

TPS51120RH applicantion diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
TPS51120RHBTG4
TPS51120RHBTG4
Texas Instruments
Current Mode PWM Controllers Dual Current Mode Sync Step-Down
Data Sheet
0-170: $2.30
170-250: $1.99
250-500: $1.94
500-1000: $1.91
TPS51120RHBT
TPS51120RHBT
Texas Instruments
Current Mode PWM Controllers Dual Current Mode Sync Step-Down
Data Sheet
0-1: $3.37
1-25: $2.52
25-100: $2.30
100-250: $1.99
TPS51120RHBRG4
TPS51120RHBRG4
Texas Instruments
Current Mode PWM Controllers Dual Current Mode Sync Step-Down
Data Sheet
0-2225: $1.78
2225-3000: $1.72
TPS51120RHBR
TPS51120RHBR
Texas Instruments
Current Mode PWM Controllers Dual Current Mode Sync Step-Down
Data Sheet
0-1: $3.30
1-25: $2.71
25-100: $2.44
100-250: $2.24