LTC1421_15 datasheet(2/24 Pages) LINER

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LTC1421/LTC1421-2.5

ABSOLUTE MAXIMUM RATINGS

PACKAGE/ORDER I FOR ATIO

Consult factory for parts specified with wider operating temperature ranges.

(Note 1)

Supply Voltage (VCCLO, VCCHI, AUXVCC) .............. 13.2V

Input Voltage (Analog Pins) ..... – 0.3V to (VCCHI + 0.3V)

Input Voltage (Digital Pins) ................... – 0.3V to 13.2V

Output Voltage (Digital Pins) .. – 0.3V to (VCCLO + 0.3V)

Output Voltage (CPON) ......... – 13.2V to (VCCLO + 0.3V)

Output Voltage (VOUTLO, VOUTHI) ........... – 0.3V to 13.2V

Output Voltage (GATELO, GATEHI) ........... – 0.3V to 20V

Operating Temperature Range

LTC1421C ............................................... 0

°C to 70°C

LTC1421I ........................................... – 40

°C to 85°C

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

°C to 150°C

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

°C

ORDER PART

NUMBER

TJMAX = 125°C, θJA = 100°C/W (G)

TJMAX = 125°C, θJA = 85°C/W (SW)

TOP VIEW

SW PACKAGE

24-LEAD PLASTIC SO

G PACKAGE

24-LEAD PLASTIC SSOP

CON1

CON2

POR

FAULT

DISABLE

PWRGD

RESET

REF

CPON

RAMP

GND

AUXVCC

VCCLO

SETLO

GATELO

VOUTLO

VCCHI

SETHI

GATEHI

VOUTHI

COMPOUT

COMP –

COMP +

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

temperature range, otherwise specifications are at TA = 25°C. VCCHI = 12V, VCCLO = 5V unless otherwise noted (Note 2).

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

DC Characteristics

ICCLO

VCCLO Supply Current

CON1 = CON2 = GND, POR = VCCLO

1.5

ICCHI

VCCHI Supply Current

CON1 = CON2 = GND, POR = VCCLO

0.6

VLKO

Undervoltage Lockout

VCCLO and VCCHI

2.28

2.45

2.60

VLKH

Undervoltage Lockout Hysteresis

VCCLO and VCCHI

100

VREF

Reference Output Voltage

No Load

1.220

1.232

1.244

∆VLNR

Reference Line Regulation

≤ VCCLO ≤ 12V, No Load

∆VLDR

Reference Load Regulation

IO = 0mA to – 5mA, Sourcing Only

IRSC

Reference Short-Circuit Current

VREF = 0V

– 45

VCOF

Comparator Offset Voltage

≤ VCM ≤(VCCLO − 1.3V)

±10

VCPSR

Comparator Power Supply Rejection

≤ VCM ≤(VCCLO − 1.3V), 3V ≤ VCCLO ≤ 12V

mV/V

VCHST

Comparator Hysteresis

≤ VCM ≤(VCCLO − 1.3V)

VRST

Reset Voltage Threshold (VOUTLO)

FB = VOUTLO

2.80

2.90

3.00

FB = Floating

4.50

4.65

4.75

FB = GND

5.75

5.88

6.01

VRHST

Reset Threshold Hysteresis (VOUTLO)

FB = VOUTLO

7mV

FB = Floating

FB = GND

RFB

FB Pin Input Resistance

≤ VFB ≤ VCCLO

Ω

VCB

Circuit Breaker Trip Voltage

VCB = (VCCLO – VSETLO) or VCB = (VCCHI – VSETHI)

VTRIP

Output Voltage for Re-Power-Up

LTC1421 (Note 3)

0.1

LTC1421-2.5 (Note 4)

2.5

LTC1421CG

LTC1421CSW

LTC1421CG-2.5

LTC1421CSW-2.5

LTC1421IG

LTC1421ISW

LTC1421IG-2.5

LTC1421ISW-2.5

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