LTC1422 datasheet(2/16 Pages) LINER

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LTC1422

1422fb

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

PACKAGE/ORDER I FOR ATIO

ORDER PART

NUMBER

TJMAX = 150°C, θJA = 130°C/W (N)

TJMAX = 150°C, θJA = 150°C/W (S)

TOP VIEW

N8 PACKAGE

8-LEAD PDIP

S8 PACKAGE

8-LEAD PLASTIC SO

RESET

TIMER

GND

VCC

SENSE

GATE

Supply Voltage (VCC) ........................................... 13.2V

Input Voltage (TIMER, SENSE) ... – 0.3V to (VCC + 0.3V)

Input Voltage (FB, ON) ........................... – 0.3V to 13.2V

Output Voltage (RESET) ........................... – 0.3V to 20V

Output Voltage (GATE) ............................. – 0.3V to 20V

Operating Temperature Range

LTC1422C ............................................... 0

°C to 70°C

LTC1422I ........................................... – 40

°C to 85°C

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

°C to 150°C

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

°C

ABSOLUTE MAXIMUM RATINGS

LTC1422CN8

LTC1422CS8

LTC1422IN8

LTC1422IS8

S8 PART MARKING

ELECTRICAL CHARACTERISTICS

1422

1422I

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

DC Characteristics

ICC

VCC Supply Current

ON = VCC

0.65

1.00

VLKO

VCC Undervoltage Lockout

2.40

2.47

2.55

VLKH

VCC Undervoltage Lockout Hysteresis

120

VFB

FB Pin Voltage Threshold

1.220

1.232

1.244

∆VFB

FB Pin Threshold Line Regulation

≤ VCC ≤ 12V

0.5

2.5

VFBHST

FB Pin Voltage Threshold Hysteresis

2.0

VTM

TIMER Pin Voltage Threshold

1.208

1.232

1.256

∆VTM

TIMER Pin Threshold Line Regulation

≤ VCC ≤ 12V

215

VTMHST

TIMER Pin Voltage Threshold Hystersis

ITM

TIMER Pin Current

Timer On, GND

≤ VTIMER ≤ 1.5V

– 2.5

– 2.0

– 1.5

µA

Timer Off, VTIMER = 1.5V

VCB

Circuit Breaker Trip Voltage

VCB = (VCC – VSENSE)

ICP

GATE Pin Output Current

Charge Pump On, VGATE = GND

–12

– 10

– 8

µA

Charge Pump Off, VGATE = VCC

∆VGATE

External N-Channel Gate Drive

VGATE – VCC

VONHI

ON Pin Threshold High

1.25

1.30

1.35

VONLO

ON Pin Threshold Low

1.20

1.23

1.26

VONHYST

ON Pin Hysteresis

VOL

Output Low Voltage

RESET, IO = 3mA

0.14

0.4

IPU

Logic Output Pull-Up Current

RESET = GND

– 12

µA

tRST

Soft Reset Time

µs

The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 5V unless otherwise noted.

(Note 1)

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

LTC1422 Datasheet(PDF) 2 Page - Linear Technology

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