I - Load Current - A

L

60%

65%

70%

75%

80%

85%

90%

0

0.5

1

1.5

2

2.5

3

V

= 12 V,

VReg = 5 V,

Fsw = 500 kHz,

L = 22 H

C

= 100 F,

T = 25 C

IN

O

A

m

m

o

Rslew = 5kW

Rslew = 35kW

I - Load Current - A

L

60%

65%

70%

75%

80%

85%

95%

0

0.5

1

1.5

2

2.5

3

VReg = 5 V,

Fsw = 500 kHz,

L = 22 H

C

= 100 F

Rslew = 5 k

m

m

W,

O

T = 25 C

A

o

V

= 6 V

IN

V

= 20 V

IN

90%

OV_TH

RST_TH

COMP

SS

VSENSE

PH

BOOT

VReg

Rslew

Vreg

VIN

LPM

VIN

EN

SYNC

nRST

GND

RT

Cdly

Supply

TPS54362

TPS54362-Q1, TPS54362A-Q1

www.ti.com

SLVS845D

– MARCH 2009 – REVISED OCTOBER 2011

3A, 60V STEP DOWN DC/DC CONVERTER WITH LOW Iq

Check for Samples: TPS54362-Q1, TPS54362A-Q1

1

FEATURES

•

Reset Function Filter Time for Fast Negative

Transients

2

•

Withstands Transients up to 60V With an

•

Programmable Overvoltage Output Monitoring

Operating Range of 3.6V to 48V

•

Programmable Undervoltage Output

•

Asynchronous Switch Mode Regulator With

Monitoring, Issuance of Reset if Output Falls

External Components (L and C), Load Current

Below Threshold

up to 3A (max)

•

Thermal Shutdown During Excessive Power

•

0.8V

± 1.5% Voltage Reference

Dissipation

•

200kHz to 2.2MHz Switching Frequency

•

Switch Current Limit Protection

•

High Voltage Tolerant Enable Input for ON/OFF

•

Short Circuit and Overcurrent Protection of

State

FET

•

Soft Start on Enable Cycle

•

Junction Temperature Range:

–40°C to 150°C

•

Slew Rate Control on Internal Power Switch

•

Package: 20-pin HTSSOP PowerPAD

™

•

External Clock Input for Synchronization

•

Qualified for Automotive Applications

•

Pulse Skip Mode (PFM) During Light Output

Loads With Quiescent Current = 65

μA Typical

APPLICATIONS

(LPM Operation)

•

Automotive Telematics

•

External Compensation for Wide Bandwidth

Error Amplifier

•

Navigation systems

•

Internal Undervoltage Lock Out UVLO

•

In-Dash Instrumentation

•

Programmable Reset Power on Delay

•

Battery Powered Applications

DESCRIPTION

The TPS54362/TPS54362A is a step down switch mode power supply with voltage supervisor. Integrated input

voltage line feed forward topology improves line transient regulation of the voltage mode buck regulator. The

regulator has a cycle-by cycle current limit. A pulse skip mode operation under no load reduces the supply

current to 65

μA. Using the enable pin, the supply shutdown current is reduced to 1μA.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright

© 2009–2011, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.