LM25141QRGETQ1 datasheet(6/49 Pages) TI1

No. de pieza	LM25141QRGETQ1

Descripción Electrónicos	2.2-MHz, 42-V Synchronous Buck Controller With Low IQ

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Fabricante Electrónico	TI1 [Texas Instruments]

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6

LM25141-Q1

SNVSAP9 – MARCH 2017

www.ti.com

Product Folder Links: LM25141-Q1

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(1)

All minimum and maximum limits are specified by correlating the electrical characteristics to process and temperature variations and

applying statistical process control.

(2)

The junction temperature (TJ in ºC) is calculated from the ambient temperature (TA in ºC) and power dissipation (PD in Watts) as follows:

TJ = TA + (PD × RθJA) where RθJA (in °C/W) is the package thermal impedance provided in the Thermal Information section.

6.5 Electrical Characteristics

TJ = –40°C to +125°C, Typical values TJ = 25°C, VIN = 12 V, VCCX = 5 V, VOUT = 5 V, EN = 5 V, OSC = VDD, FSW = 2.2

MHz, no-load on the Drive Outputs (HO, HOL, LO, and LOL outputs), over operating free-air temperature range (unless

otherwise noted)

(1) (2)

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

VIN SUPPLY VOLTAGE

ISHUTDOWN

Shutdown mode current

VIN = 8–18 V, EN = 0 V, VCCX = 0 V

10

12.5

µA

ISTANDBY

Standby current

EN = 5 V, FB = VDD, VOUT in

regulation, no-load, not switching,

DEMB = GND.

35

45

µA

EN = 5 V, FB = 0 V, VOUT in

regulation, no-load, not switching,

VCCX = 5 V, DEMB = GND.

42

55

VCC REGULATOR

VCC(REG)

VCC regulation voltage

VIN = 6–18 V, 0–75 mA, VCCX = 0 V

4.75

5

5.25

V

VCC(UVLO)

VCC undervoltage threshold

VCC rising, VCCX = 0 V

3.25

3.4

3.55

V

VCC(HYST)

VCC hysteresis voltage

VCCX = 0 V

175

mV

ICC(LIM)

VCC sourcing current limit

VCCX = 0 V

85

125

mA

VDDA

VDDA(REG)

Internal bias supply power

VCCX = 0 V

4.75

5

5.25

V

VDDA(UVLO)

VCC rising, VCCX = 0 V

3.1

3.2

3.3

V

VDDA(HYST)

VCCX = 0 V

125

mV

RVDDA

VCCX = 0 V

55

Ω

VCCX

VCCX(ON)

VCC rising

4.1

4.3

4.4

V

VCCX(HYST)

80

mV

R(VCCX)

VCCX = 5 V

2

Ω

OSCILLATOR SELECT THRESHOLDS

Oscillator select threshold 2.2 MHz

(OSC pin)

2.0

V

Oscillator select threshold 440 kHz

(OSC pin)

0.8

V

CURENT LIMIT

V(CS)

Current limit threshold

ILSET = VDDA, measure from CS to

VOUT

68

75

82

mV

tdly

Current sense delay to output

40

ns

Current sense amplifier gain

11.4

12

12.6

V/V

ICS(BIAS)

Amplifier input bias

10

nA

RES

I(RES)

RES current source

20

µA

V(RES)

RES threshold

1.2

V

Timer

Timer hiccup mode fault

512

cycles

RDS(ON)

RES pulldown

4

Ω

OUTPUT VOLTAGE REGULATION

3.3 V

VIN = 3.8–42 V

3.273

3.3

3.327

V

5 V

VIN = 5.5–42 V

4.96

5.0

5.04

V

FEEDBACK

VOUT select threshold 3.3 V

VDD – 0.3

V

Regulated feedback voltage

1.193

1.2

1.207

V

FB(LOWRES)

Resistance to ground on FB for FB

= 0 detection

500

Ω

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LM25141QRGETQ1 Datasheet(PDF) 6 Page - Texas Instruments

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