LM25085AMMSLASHNOPB datasheet(3/31 Pages) TI1

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LM25085A

www.ti.com

SNVS601B – JANUARY 2009 – REVISED MARCH 2013

Absolute Maximum Ratings

(1) (2)

VIN to GND

-0.3V to 45V

ISEN to GND

-0.3V to VIN + 0.3V

ADJ to GND

-0.3V to VIN + 0.3V

RT, FB to GND

-0.3V to 7V

VIN to VCC, VIN to PGATE

-0.3V to 10V

ESD Rating (3)

Human Body Model

2kV

Storage Temperature Range

-65°C to +150°C

(1)

Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which

operation of the device is intended to be functional. For specifications and test conditions, see the Electrical Characteristics.

(2)

If Military/Aerospace specified devices are required, please contact the TI Sales Office/ Distributors for availability and specifications.

(3)

The human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin.

Operating Ratings

(1)

VIN Voltage

4.5V to 42V

Junction Temperature

−40°C to + 125°C

(1)

Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which

operation of the device is intended to be functional. For specifications and test conditions, see the Electrical Characteristics.

Electrical Characteristics

Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°C

to +125°C. Minimum and Maximum limits are specified through test, design, or statistical correlation. Typical values represent

the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the

following conditions apply: VIN = 24V, RT = 100 kΩ.

Symbol

Parameter

Conditions

Min

Typ

Max

Units

VIN Pin

IIN

Operating current

Non-switching, FB = 1.05V (1)

1.25

1.75

Shutdown current

RT = 0V (1)

175

300

µA

VCC Regulator (2)

VCC(reg)

VIN - VCC

Vin = 9V, FB = 1.05V, ICC = 0 mA

6.9

7.7

8.5

Vin = 9V, FB = 1.05V, ICC = 20 mA

7.7

Vin = 42V, FB = 1.05V, ICC = 0 mA

7.7

UVLOVcc

VCC under-voltage lock-out

VCC increasing

3.8

threshold

UVLOVcc hysteresis

VCC decreasing

260

VCC(CL)

VCC Current Limit

FB = 1.05V

PGATE Pin

VPGATE(HI)

PGATE High voltage

PGATE Pin = Open

VIN -0.1

VIN

VPGATE(LO)

PGATE Low voltage

PGATE Pin = Open

VCC

VCC+0.1

VPGATE(HI)4.5

PGATE High Voltage at Vin = 4.5V

PGATE Pin = Open

VIN -0.1

VIN

VPGATE(LO)4.5

PGATE Low Voltage at Vin = 4.5V

PGATE Pin = Open

VCC

VCC+0.1

IPGATE

Driver Output Source Current

VIN = 12V, PGATE = VIN - 3.5V

1.75

Driver Output Sink Current

VIN = 12V, PGATE = VIN - 3.5V

1.5

RPGATE

Driver Output Resistance

Source current = 500 mA

2.3

Ω

Sink current = 500 mA

2.3

Ω

Current Limit Detection

IADJ

ADJUST pin current source

VADJ = 22.5V

µA

VCL OFFSET

Current limit comparator offset

VADJ = 22.5V, VADJ - VISEN

-9

(1)

Operating current and shutdown current do not include the current in the RT resistor.

(2)

VCC provides self bias for the internal gate drive.

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