LT7153SP datasheet(4/31 Pages) AD

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Data Sheet

LT7153SP

analog.com

Rev 0

4 of 31

SPECIFICATIONS

Table 1. Electrical Characteristics

(Specifications are at TA = 25°C. VIN = 5V, unless otherwise noted.)

PARAMETER

SYMBOL

CONDITIONS/COMMENTS

MIN

TYP

MAX

UNITS

Supply Voltage Range

SVIN

-40°C ≤ TJ ≤ 125°C

2.7

PVIN

1.5

VOUT Operating Voltage

VOUT

RRT = 100kΩ

0.5

0.9VIN

Supply Operating

Current2

IQ (ACT)

Active, No-Load

RRT = 100kΩ, MODE/SYNC = 0

1.5

Supply Shutdown

Current2

IQ (SHDN)

VRUN = 0V

µA

VIN OV Threshold

VIN-OV

Rising

8.0

Falling

7.5

RUN Threshold

VRUN

Rising

1.13

1.18

1.23

VRUN_Hys

Hysteresis

INTVcc Regulated Voltage

VINTVCC

SVIN > 4V

3.45

3.6

3.75

INTVcc UVLO

VUVLO

Rising

2.55

2.65

Falling

2.4

BUCK Regulator Loop

FB regulation Voltage3

VFB

ITH = 1V

-40°C ≤ TJ ≤ 125°C

496

500

504

FB Line and Load

Regulation3

ΔVFB(LINE+LOAD)

AVPSEL = 0V

-40°C ≤ TJ ≤ 125°C

0.05

0.3

AVPSEL = Float, ITH > 1V

AVPSEL = INTVcc, ITH > 1V

1.5

FB Pin Input Current

IFB

-40°C ≤ TJ ≤ 125°C

-50

Error Amplifier gm

GM(EA)

ITH = 1V

0.85

1.15

Minimum On-Time

tON(MIN)

-40°C ≤ TJ ≤ 125°C

Minimum Off-Time

tOFF(MIN)

Positive Inductor

Valley Current Limit4

ILIM-POS

FB = 0.48V

Current Threshold vs.

ITH Voltage

ILIM-ITH

ITH = 1.3V

ITH = 1.0V

ITH = 0.7V

-25

Negative Inductor

Valley Current Limit

ILIM-NEG

FB = 0.52V

-60

Top Power NMOS On

Resistance

RON-TOP

INTVcc= 3.6V

1.8

mΩ

Bottom Power NMOS

On Resistance

RON-BOT

INTVcc= 3.6V

0.7

mΩ

Top Switch Leakage

ISW-TOP

VIN= 5V, VSW= 0V

0.5

µA

Bottom Switch

Leakage

IBOT-TOP

VIN= 5V, VSW= 5V

µA

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