TPS51124 Status: ACTIVE

Dual, Synchronous Step Down Controller for Low Voltage System Power

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Datasheet

Dual Synchronous Step Down Controller For Low Voltage Power Rails (Rev. A) (PDF 1551 KB)
29 Nov 2005

	TPS51120	TPS51123	TPS51124	TPS51125	TPS51220	TPS53124	TPS53125	TPS53126
Topology	Buck,D-CAP™ Mode	Buck,D-CAP™ Mode	Buck,D-CAP™ Mode	Buck,D-CAP™ Mode	Buck,D-CAP™ Mode	Buck, D-CAP™Mode	Buck, D-CAP2™ Mode	Buck, D-CAP2™ Mode
Vin(Min)(V)	4.5	5.5	3	5.5	4.5	4.5	4.5	4.5
Vin(Max)(V)	28	28	28	28	28	24	24	24
Vout(Min)(V)	1.05	2.0	0.76	2	1	0.76	0.76	0.76
Vout(Max)(V)	5.5	5.5	5.5	5.5	12	5.5	5.5	5.5
Regulated Outputs(#)	2	2	2	2	2	2	2	2
Iout(Max)(A)	20	20	15	20	20	15	15	15
Switching Frequency(Max)(kHz)	580	460	420	460	1000	380	350	350, 700
Iq(Typ)(mA)	0.75	0.55	0.35	0.55	1.3	0.45	0.45	0.45
Pin/Package	32QFN	24VQFN	24VQFN	24VQFN	32QFN	24VQFN, 28TSSOP	24TSSOP	24TSSOP, 24VQFN
Thermal Shutdown	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Vout2(Min)(V)	1.05	2.0	0.76	2	1	0.76	0.76	0.76
Vout2(Max)(V)	5.5	5.5	5.5	5.5	12	5.5	5.5	5.5
Iout2(A)	20	20	20	20	20	15	15	15
Rating	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog	Catalog
Duty Cycle(Max)(%)	88	93	88	93	99	89	89	89
	Samples	Samples	Samples	Samples	Samples	Samples	Samples	Samples
	Inventory	Inventory	Inventory	Inventory	Inventory	Inventory	Inventory	Inventory

Customers Who Evaluated This Product Also Evaluated

TPS51116: DDR1, DDR2, DDR3 Switcher and LDO
TPS51125: Dual-Synchronous, Step-Down Controller with Out-of-AudioT Operation and 100-mA LDOs
TPS51117: 1.8V to 28V Input Sync. Step Down Controller with DCAP™ Mode, Optimized for Light Load Efficiency
TPS54418: 2.95V to 6V Input, 4A, 2MHz Synchronous Step Down SWIFT™ DCDC Converter
TLV431A: Low Voltage Adjustable Precision Shunt Regulator
TPS2231: ExpressCard Single Power Interface Switch

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Product Information

Features

High Efficiency, Low-Power Consumption, Shutdowns to <1 µA
Fixed Frequency Emulated On-Time Control, Frequency Selectable From Three Options
D-CAP™ Mode Enables Fast Transient Response
Auto-Skip Mode
Less Than 1% Initial Reference Accuracy
Low Output Ripple
Wide Input Voltage Range: 3 V to 28 V
Output Voltage Range: 0.76 V to 5.5 V
Low-Side R_DS(ON) Loss-less Current Sensing
Adaptive Gate Drivers With Integrated Boost Diode
Internal 1.2-ms Voltage-Servo Soft Start
Power-Good Signals for Each Channel With Delay Timer
Output Discharge During Disable, Fault
APPLICATIONS
- Notebook I/O and Low Voltage System Bus

D-CAP, PowerPAD are trademarks of Texas Instruments.

Description

The TPS51124 is a dual, adaptive on-time D-CAP™ mode synchronous buck controller. The part enables system designers to cost effectively complete the suite of notebook power bus regulators with the absolute lowest external component count and lowest standby consumption. The fixed frequency emulated adaptive on-time control supports seamless operation between PWM mode at heavy load condition and reduced frequency operation at light load for high efficiency down to milliampere range. The main control loop for the TPS51124 uses the D-CAP mode that optimized for low ESR output capacitors such as POSCAP or SP-CAP promises fast transient response with no external compensation. Simple and separate power good signals for each channel allow flexibility of power sequencing. The part provides a convenient and efficient operation with supply input voltages (V5IN, V5FILT) ranging from 4.5 V to 5.5 V, conversion voltages (drain voltage for the synchronous high-side MOSFET) from 3 V to 28 V and output voltages from 0.76 V to 5.5 V.

The TPS51124 is available in 24-pin QFN package specified from -40°C to 85°C ambient temperature range.

Pricing / Packaging / CAD Design Tools / Samples

			Price	Packaging			CAD Design Tools	Samples
Device	Status	Temp (^oC)	Price \| Quantity	Package \| Pins	Top Side Marking	Package QTY \| Package Carrier	Symbols	Samples
TPS51124RGER	ACTIVE	-40 to 85	2.10 \| 1ku	VQFN (RGE) \| 24	View	3000 \| LARGE T&R	Purchase Samples
TPS51124RGERG4	ACTIVE	-40 to 85	2.10 \| 1ku	VQFN (RGE) \| 24	View	3000 \| LARGE T&R	Purchase Samples
TPS51124RGET	ACTIVE	-40 to 85	2.35 \| 1ku	VQFN (RGE) \| 24	View	250 \| SMALL T&R
TPS51124RGETG4	ACTIVE	-40 to 85	2.35 \| 1ku	VQFN (RGE) \| 24	View	250 \| SMALL T&R

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 10:04 AM GMT, 06 Nov 2009
Region	Company	In Stock	Purchase
TI Lead Time*: 20 WeeksTPS51124RGER
None Reported View Distributors
TI Lead Time*: 20 WeeksTPS51124RGERG4
None Reported View Distributors
TI Lead Time*: 20 WeeksTPS51124RGET
Americas	Avnet	216
Asia	Farnell Asia	8
TI Lead Time*: 20 WeeksTPS51124RGETG4
Asia	Farnell Asia	72
Europe	Farnell	72
Worldwide	Mouser Electronics	250
View all Distributors

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

	Product Content				DPPM / MTBF / FIT Rate
Device	Eco Plan*	Lead / Ball Finish	MSL Rating / Peak Reflow	Details	Details
TPS51124RGER	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS51124RGERG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS51124RGET	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View
TPS51124RGETG4	Green (RoHS & no Sb/Br)	CU NIPDAU	Level-2-260C-1 YEAR	View	View

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for TPS51124

Datasheet

Dual Synchronous Step Down Controller For Low Voltage Power Rails (Rev. A) (PDF, 1551 KB)
29 Nov 2005

Application Notes

Adaptive Constant On-Time (D-CAPTM) Control Study in Notebook Applications (Rev. B) (HTM, 8 KB) 915 views
04 Dec 2007 Read Abstract
Intel ATOM Power Solutions (Rev. A) (HTM, 8 KB) 2579 views
07 May 2009 Read Abstract

View Application Notes for DC/DC Controllers (External Switch)

User Guides

Using the TPS51124 (Rev. A) (PDF, 551 KB) 1024 views
30 Jun 2008

View User Guides for DC/DC Controllers (External Switch)

Solution Guides

Notebook Computer Guide (Rev. A) (PDF, 2854 KB) 16933 views
30 Sep 2008

Tools & Software

Name	Part #	Company	Tool / Software Type
Highly Efficient, Dual Synchronous Buck Converter Evaluation Module	TPS51124EVM-001	Texas Instruments	Development Boards/EVMs

Simulation Models

PSpice Model
- TPS51124 PSpice Model (Rev. B) (ZIP, 95 KB) 171 views
  24 Sep 2008
TINA-TI Reference Design
- TPS51124 TINA-TI Reference Design (Rev. B) (ZIP, 117 KB) 132 views
  17 Dec 2008
TINA-TI Spice Model
- TPS51124 TINA-TI Transient Spice Model (Multiple File Format) 68 views
  17 Dec 2008 Read Abstract

Customers Who Evaluated This Product Also Evaluated...
Part #	Name	Product Family	Comments
TPS51116	DDR1, DDR2, DDR3 Switcher and LDO	NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH)	TI customers also evaluated this product.
TPS51125	Dual-Synchronous, Step-Down Controller with Out-of-AudioT Operation and 100-mA LDOs	NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH)	TI customers also evaluated this product.
TPS51117	1.8V to 28V Input Sync. Step Down Controller with DCAP™ Mode, Optimized for Light Load Efficiency	NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH)	TI customers also evaluated this product.
TPS51120	Dual Current Mode, Synch Step-Down Controller With 100-mA Standby Reg For Notebook System Power	NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH)	TI customers also evaluated this product.
TPS51218	3V to 28V Input. 20A Synchronous Step Down Controller with DCAP™ Mode for Notebook Power Supply	NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH)	TI customers also evaluated this product.
TPS51220	Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller	NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH)	TI customers also evaluated this product.
TPS53126	Dual Sync. Step-Down Controller for Low Voltage Power Rails, 350kHz or 700kHz Frequency	NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH)	TI customers also evaluated this product.
TPS51610	Single Phase D-CAP+™Mode Step Down Controller for IMVP6+ CPU/GPU Vcore	NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH)	TI customers also evaluated this product.
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TPS51124 Status: ACTIVE

Dual, Synchronous Step Down Controller for Low Voltage System Power

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