4

Power Management for FPGAs Sine On

Texas Instruments 2Q 2007

4.5-V to 52-V Input, Low-Pin Count

Buck Controller

TPS40200

Get samples, datasheets, app reports and evaluation modules at:

Key Features

• 4.5-V to 52-V operation

• Voltage mode control with feed-forward compensation

• 700-mV voltage reference: 1% accuracy

• Internal under-voltage lockout

• Programmable frequency: 35 kHz to 500 kHz

• Programmable overcurrent protection

• Frequency synchronization

• Closed loop soft-start

• Integrated driver

Benefits

• Wide-input range for use in many applications

• Voltage feed forward – great line regulation, fast transient

response

• Programmable features allows flexible design; frequency,

overcurrent protection, under-voltage lockout

• Soft-start provides smooth, well controlled power up

• Simple configuration — minimal external components

Applications

• Altera Cyclone II, Stratix II, Stratix II GX, Stratix III

• Xilinx Spartan-3 family, Virtex-5

• Core and IO power supplies

DA T A

SHEETS

EVALUATION

MODULE

APP

REPORT

O D U C

A

M P L E

Step-Down Controllers

4.5-V to 15-V Input, Synchronous

Buck DC/DC Controller

TPS40190

Get samples, datasheets, app reports, evaluation modules and

software tools at:

Key Features

• Input operating voltage range: 4.5 V to 15 V

• Output voltage down to 0.591 V with +1% reference accuracy

• Synchronous rectification for high efficiency

• Three selectable short-circuit thresholds

• Hiccup recovery from short-circuit condition

• Integrated bootstrap drivers for N-Channel MOSFET

• Internal soft-start

Benefits

• High-performance, low-cost solution

• Allows for a single-input power solution, no separate power

supply needed to power the controller

• Provides power supply flexibility without adding circuit

complexity

DA T A

SHEETS

EVALUATION

MODULE

APP

REPORT

O D U C

A

M P L E

• Fewer external components, simplifies design

• Minimized switching losses improves efficiency

• Up to 25-A power supply possible with the TPS40190

• Minimizes power dissipation in fault condition, automatically restarts

when fault is removed

Applications

• Altera Cyclone II, Stratix II, Stratix II GX, Stratix III

• Xilinx Spartan-3 family, Virtex-5

• Core and IO power supplies

TPS40190

V

DD

V

OUT

Shutdown

ENABLE

FB

COMP

VDD

GND

HDRV

SW

BOOT

LDRV

BP5

10

9

8

7

6

1

2

3

4

5

TPS40200

RC

SS/SD

COMP

FB

VIN

ISNS

GDRV

GND

1

2

3

4

8

7

6

5

R

SENSE

V

IN

V

OUT