LTC1876EG datasheet(2/36 Pages) LINER

2 / 36 page

LTC1876

1876fa

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Main Control Loops

VOSENSE1, 2

Regulated Feedback Voltage

ITH1, 2 Voltage = 1.2V (Note 4)

0.792

0.800

0.808

IVOSENSE1, 2

Feedback Current

(Note 4)

–5

–50

VREFLNREG

Reference Voltage Line Regulation

VIN = 3.6V to 30V (Note 4)

0.002

0.02

%/V

VLOADREG

Output Voltage Load Regulation

(Note 4)

Measured in Servo Loop;

∆ITH Voltage = 1.2V to 0.7V

0.1

0.5

Measured in Servo Loop;

∆ITH Voltage = 1.2V to 2V

–0.1

–0.5

gm1, 2

Transconductance Amplifier gm

ITH1, 2 = 1.2V; Sink/Source 5µA; (Note 4)

1.3

mmho

gmOL1, 2

Transconductance Amplifier GBW

ITH1, 2 = 1.2V; (Note 4)

MHz

Input DC Supply Current

(Note 5)

Normal Mode

VIN = 15V; EXTVCC Tied to VOUT1; VOUT1 = 5V

350

µA

Standby

VRUN/SS1, 2 = 0V, VSTBYMD > 2V

125

µA

Shutdown

VRUN/SS1, 2 = 0V, VSTBYMD = Open

µA

VFCB

Forced Continuous Threshold

0.76

0.800

0.84

IFCB

Forced Continuous Current

VFCB = 0.85V

–0.3

–0.18

–0.1

µA

VBINHIBIT

Burst Inhibit (Constant Frequency)

Measured at FCB pin

4.3

4.8

Threshold

Input Supply Voltage (VIN)......................... 36V to –0.3V

Topside Driver Voltages

(BOOST1, BOOST2) ................................... 42V to –0.3V

Switch Voltage (SW1, SW2) ......................... 36V to –5V

INTVCC, EXTVCC, RUN/SS1, RUN/SS2, PGOOD,

(BOOST1-SW1), (BOOST2-SW2), ...............7V to – 0.3V

SENSE1+, SENSE2+, SENSE1–, SENSE2–

Voltages ................................... (1.1)INTVCC to –0.3V

FREQSET, STBYMD, FCB, PGOOD

Voltages .................................................. 7V to – 0.3V

ITH1, ITH2, VOSENSE1, VOSENSE2 Voltages ... 2.7V to –0.3V

Peak Output Current <10

µs (TG1, TG2, BG1, BG2) ... 3A

INTVCC Peak Output Current ................................ 50mA

AUXVIN .................................................................. 16V to –0.3V

AUXSD ..................................................................... 10V

AUXSW ..................................................... 36V to –0.3V

AUXVFB Voltage ....................................... 2.5V to –0.3V

Current into AUXVFB ....................................................... ±1mA

Operating Temperature Range (Note 2) ...–40

°C to 85°C

Junction Temperature (Note 3) ............................. 125

°C

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

°C to 150°C

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

°C

ORDER PART

NUMBER

TJMAX = 125°C, θJA = 95°C/W

Consult factory for parts specified with wider operating temperature ranges.

LTC1876EG

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

(Note 1)

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

temperature range, otherwise specifications are at TA = 25°C. VIN = 15V, VRUN/SS1, 2 = 5V, AUXVIN = 3V unless otherwise noted.

TOP VIEW

G PACKAGE

36-LEAD PLASTIC SSOP

PGOOD

TG1

SW1

BOOST1

VIN

BG1

EXTVCC

INTVCC

PGND

BG2

BOOST2

SW2

TG2

RUN/SS2

AUXSD

AUXVIN

AUXPGND

RUN/SS1

SENSE1+

SENSE1–

VOSENSE1

FREQSET

STBYMD

FCB

ITH1

SGND

3.3VOUT

IITH2

VOSENSE2

SENSE2–

SENSE2+

AUXSGND

AUXVFB

AUXSW

LTC1876EG 数据表(PDF) 2 Page - Linear Technology

LTC1876EG 数据表(HTML) 2 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

数据表下载