LTC4244IGN datasheet(2/28 Pages) LINER

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LTC4244/LTC4244-1

42441f

GN PACKAGE

20-LEAD PLASTIC SSOP

TOP VIEW

12VIN

VEEIN

5VOUT

TIMER

OFF/ON

FAULT

PWRGD

GND

RESETIN

RESETOUT

12VOUT

VEEOUT

3.3VOUT

3.3VIN

3.3VSENSE

GATE

5VSENSE

5VIN

PRECHARGE

DRIVE

(Notes 1, 2, 3)

Supply Voltages

12VIN ................................................................ 14.4V

VEEIN .............................................................. –14.4V

Input Voltages (OFF/ON, RESETIN) ........– 0.3V to 13.5V

Output Voltages (FAULT, PWRGD, RESETOUT)

...........................................................– 0.3V to 13.5V

Analog Voltages and Currents

5VOUT, DRIVE, 5VIN, 3.3VSENSE, 3.3VIN, 3.3VOUT, 5VSENSE

...........................................................– 0.3V to 13.5V

PRECHARGE, GATE .......................................

±20mA

VEEOUT ................................................ –14.4V to 0.3V

TIMER, 12VOUT ...........................................– 0.3V to 14.4V

Operation Temperature Range

LTC4244C/LTC4244C-1 ........................... 0

°C to 70°C

LTC4244I/LTC4244I-1 ........................ – 40

°C to 85°C

Storage Temperature Range ................. – 65

°C to 150°C

Lead Temperature (Soldering, 10 sec).................. 300

°C

ORDER PART

NUMBER

LTC4244CGN

LTC4244CGN-1

LTC4244IGN

LTC4244IGN-1

TJMAX = 140°C, θJA = 135°C/ W

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IDD

V12VIN Supply Current

OFF/ON = 0V

410

VLKO

Undervoltage Lockout

12VIN, Ramping Down

5VIN, Ramping Down

4.25

4.5

3.3VIN, Ramping Down

2.25

2.5

2.75

VEEIN, Ramping Up (LTC4244 Only)

–8.25

–9.25

–10.25

TIMER, Ramping Down, V12VIN = 6V

8.25

9.25

10.25

VFB

Foldback Current Limit Voltage

VFB = (V5VIN – V5VSENSE), V5VOUT = 0V, TIMER = 0V

VFB = (V5VIN – V5VSENSE), V5VOUT = 3V, TIMER = 0V

VFB = (V3.3VIN – V3.3VSENSE), V3.3VOUT = 0V, TIMER = 0V

VFB = (V3.3VIN – V3.3VSENSE), V3.3VOUT = 2V, TIMER = 0V

VCB

Circuit Breaker Trip Voltage

VCB = (V5VIN – V5VSENSE), TIMER = FLOAT

VCB = (V3.3VIN – V3.3VSENSE), TIMER = FLOAT

tOC

Overcurrent Fault Response Time (V5VIN – V5VSENSE) = 100mV, TIMER = FLOAT

µs

(V3.3VIN – V3.3VSENSE) = 100mV, TIMER = FLOAT

µs

IGATE(UP)

GATE Pin Output Current

OFF/ON = 0V, VGATE = 2V, TIMER = 0V

–20

–67

–100

µA

IGATE(DN)

VGATE = 5V, OFF/ON = 4V

100

µA

IGATE(FAULT)

OFF/ON = 0V, VGATE = 2V, TIMER = FLOAT, FAULT = 0V

∆VGATE

External Gate Voltage

∆VGATE = (V12VIN – VGATE), IGATE = –1µA

0.6

∆V12V

Internal Switch Voltage Drop

∆V12V = (V12VIN – V12VOUT), I = 500mA

225

600

∆VVEE

∆VVEE = (VEEOUT – VEEIN), IEE = 100mA

110

250

Consult LTC Marketing for parts specified with wider operating temperature ranges.

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. V12VIN = 12V, VEEIN = –12V, V3.3VIN = 3.3V, V5VIN = 5V, unless

otherwise noted.

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