LTC4232 datasheet(3/22 Pages) AD

3 / 22 page

LTC4231

Rev. B

For more information www.analog.com

ORDER INFORMATION

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. IN = 12V, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX UNITS

VIN

Input Supply Voltage Range

2.7

VIN(UVL)

Input Supply Undervoltage Lockout

IN Rising

2.3

2.6

∆VIN(HYST)

Input Supply Undervoltage Lockout

Hysteresis

200

ICC

Supply Current (Average)

Normal On, Voltage or Current Fault

Start-Up or Overcurrent

Shutdown

Reverse Input

(Note 5)

IGATE ≤ –0.1µA, CGATE-SOURCE = 1nF, (C-Grade, I-Grade)

(H-Grade)

SHDN Low, GATE Pulled to GND, (C-Grade, I-Grade)

(H-Grade)

IN, SENSE = –40V

300

0.3

–2.5

600

–5

µA

SENSE

∆VSENSE(CB)

Circuit Breaker Threshold (VIN – VSENSE)

∆VSENSE(ACL)

Analog Current Limit

During Output Short-Circuit

ISENSE

SENSE Input Current

SHDN = High, SENSE = 12V

0.3

µA

GATE, SOURCE

∆VGATE

External N-Channel Gate Drive

(VGATE – VSOURCE)

VIN < 7V, IGATE = 0, –0.1µA

VIN ≥ 7V, IGATE = 0, –0.1µA

4.5

6.2

11.4

∆VGATE(H)

∆VGATE (VGATE – VSOURCE) Threshold

That Deactivates the Charge Pump

VIN < 7V

VIN ≥ 7V

5.5

6.5

11.7

VGATE(L)

GATE Low Threshold

To Enter Shutdown or Voltage Fault

0.4

1.2

1.8

IGATE(UP)

GATE Pull-Up Current

GATE On, GATE = 1V

–7

–10

–13

µA

IGATE(FAST)

GATE Fast Pull-Down Current

∆VSENSE = 0.5V, ∆VGATE = 5V

130

IGATE(SLOW)

GATE Slow Pull-Down Current

SHDN = 0V, ∆VGATE = 5V

0.6

tD(ON)

Turn-On Debounce Delay

UVL = UVH = 2V, OV = 0V, SHDN = Step 0V to 5V

tRETRY

Auto-Retry Delay

LTC4231-2

0.27

0.5

0.73

tPHL(ILIM)

Overcurrent to GATE Low Propagation

Delay

∆VSENSE = Step 0mV to 300mV,

CGATE = 1nF, ∆VGATE Crosses 1V

0.5

µs

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

AUTOMOTIVE PRODUCTS**

LTC4231IMS-1#WPBF

LTC4231IMS-1#WTRPBF 42311

12-Lead Plastic MSOP

–40°C to 85°C

LTC4231IMS-2#WPBF

LTC4231IMS-2#WTRPBF 42312

12-Lead Plastic MSOP

–40°C to 85°C

LTC4231HMS-1#WPBF

LTC4231HMS-1#WTRPBF 42311

12-Lead Plastic MSOP

–40°C to 125°C

LTC4231HMS-2#WPBF

LTC4231HMS-2#WTRPBF 42312

12-Lead Plastic MSOP

–40°C to 125°C

Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

Tape and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.

**Versions of this part are available with controlled manufacturing to support the quality and reliability requirements of automotive applications. These

models are designated with a #W suffix. Only the automotive grade products shown are available for use in automotive applications. Contact your

local Analog Devices account representative for specific product ordering information and to obtain the specific Automotive Reliability reports for

these models.

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