Product Summary

The TPS51124 is a dual, adaptive on-time D-CAP mode synchronous buck controller. The part enables system desingers to cost effectively complete the suit of notebook power bus regulators with the absolute lowest external component count and lowest standby consumption. The TPS51124 fixed frequency emulated adaptive on-tmie control supports seamless operation betweent PWM mode at heavy load condition and reduced frequency operation at light load for high efficiency down to miliampere range. The TPS51124 is suitable for Notebook I/O and Low Voltage System Bus.

Parametrics

TPS51124 absolute maximum ratings: (1)input voltage range, VBST1, VBST2: –0.3 to 36V; Input voltage VBST1, VBST2 (wrt LLx): –0.3 to 6 V; V5IN, V5FILT, EN1, EN2, VFB1, VFB2, TRIP1, TRIP2, VO1, VO2, TONSEL: –0.3 to 6V; (2)output voltage range, DRVH1, DRVH2: –1 to 36V; DRVH1, DRVH2 (wrt LLx): –0.3 to 6V; LL1, LL2: –2 to 30 V; PGOOD1, PGOOD2, DRVL1, DRVL2: –0.3 to 6V; PGND1, PGND2: –0.3 to 0.3V; (3)TA, Operating ambient temperature range: –40 to 85℃; (4)Tstg, Storage temperature range: –55 to 150℃; (5)TJ, Junction temperature range: –40 to 125℃.

Features

TPS51124 features: (1)High Efficiency, Low-Power Consumption, Shutdowns to <1 mA; (2)Fixed Frequency Emulated On-Time Control, Frequency Selectable From Three Options; (3)D-CAP Mode Enables Fast Transient Response; (4)Auto-Skip Mode; (5)Less Than 1% Initial Reference Accuracy; (6)Low Output Ripple; (7)Wide Input Voltage Range: 3 V to 28 V; (8)Output Voltage Range: 0.76 V to 5.5 V; (9)Low-Side RDS(ON) Loss-less Current Sensing; (10)Adaptive Gate Drivers With Integrated Boost Diode; (11)Internal 1.2-ms Voltage-Servo Soft Start; (12)Power-Good Signals for Each Channel With Delay Timer; (13)Output Discharge During Disable, Fault.

Diagrams

TPS51124 circuit

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
TPS51124
TPS51124
Other

Data Sheet
Negotiable 
TPS51124EVM-001
TPS51124EVM-001
Texas Instruments
Power Management IC Development Tools BUCK CONTROLLER
Data Sheet
0-1: $33.17
TPS51124RGER
TPS51124RGER
Texas Instruments
DC/DC Switching Controllers Dual Sync Step Down for Lo-Vltg Sys Pwr
Data Sheet
0-1: $2.25
1-25: $2.00
25-100: $1.55
100-250: $1.46
TPS51124RGERG4
TPS51124RGERG4
Texas Instruments
DC/DC Switching Controllers Dual Sync Step Down for Lo-Vltg Sys Pwr
Data Sheet
0-2355: $1.42
2355-3000: $1.39
TPS51124RGET
TPS51124RGET
Texas Instruments
DC/DC Switching Controllers Dual Sync Step Down for Lo-Vltg Sys Pwr
Data Sheet
0-1: $2.89
1-25: $2.12
25-100: $1.81
100-250: $1.70
TPS51124RGETG4
TPS51124RGETG4
Texas Instruments
DC/DC Switching Controllers Dual Sync Step Down for Lo-Vltg Sys Pwr
Data Sheet
0-180: $1.81
180-250: $1.70
250-500: $1.67
500-1000: $1.64