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LTC1929/LTC1929-PG

ORDER PART

NUMBER

LTC1929CG

LTC1929CG-PG

LTC1929IG

LTC1929IG-PG

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

TJMAX = 125°C, θJA = 95°C/W

Consult factory for Military grade parts.

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/SS = 5V unless otherwise noted.

(Note 1)

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

Topside Driver Voltages (BOOST1,2) .........42V to – 0.3V

Switch Voltage (SW1, 2) .............................36V to – 5 V

SENSE1+, SENSE2 +, SENSE1–,

SENSE2 – Voltages ........................ (1.1)INTVCC to –0.3V

EAIN, VOS+, VOS–, EXTVCC, INTVCC,

RUN/SS, AMPMD Voltages .......................... 7V to – 0.3V

Boosted Driver Voltage (BOOST-SW) .......... 7V to – 0.3V

PLLFLTR, PLLIN, VDIFFOUT Voltages .... INTVCC to –0.3V

ITH Voltage ................................................2.7V to –0.3V

Peak Output Current <1

µs(TGL1,2, BG1,2)................ 3A

INTVCC RMS Output Current ................................ 50mA

Operating Ambient Temperature Range

LTC1929C .................................................. 0

°C to 85°C

LTC1929I .............................................. – 40

°C to 85°C

Junction Temperature (Note 2) ............................. 125

°C

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

°C to 150°C

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

°C

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Main Control Loop

VEAIN

Regulated Feedback Voltage

(Note 3); ITH Voltage = 1.2V

0.792

0.800

0.808

VSENSEMAX

Maximum Current Sense Threshold

VSENSE– = 5V

VSENSE1, 2 = 5V, LTC1929 Only

IINEAIN

Feedback Current

(Note 3)

– 5

– 50

VLOADREG

Output Voltage Load Regulation

(Note 3)

Measured in Servo Loop; ITH Voltage = 0.7V

0.05

0.5

Measured in Servo Loop; ITH Voltage = 2V

– 0.1

– 0.5

VREFLNREG

Reference Voltage Line Regulation

VIN = 3.6V to 30V (Note 3)

0.002

0.02

%/V

VOVL

Output Overvoltage Threshold

Measured at VEAIN

0.84

0.86

0.88

UVLO

Undervoltage Lockout

VIN Ramping Down

3.5

Transconductance Amplifier gm

ITH = 1.2V; Sink/Source 5µA; (Note 3)

mmho

gmOL

Transconductance Amplifier Gain

ITH = 1.2V; (gmxZL; No Ext Load); (Note 3)

1.5

V/mV

Input DC Supply Current

(Note 4)

Normal Mode

EXTVCC Tied to VOUT; VOUT = 5V

470

µA

Shutdown

VRUN/SS = 0V

µA

IRUN/SS

Soft-Start Charge Current

VRUN/SS = 1.9V

– 0.5

–1.2

µA

VRUN/SS

RUN/SS Pin ON Threshold

VRUN/SS Rising

1.0

1.5

1.9

VRUN/SSLO

RUN/SS Pin Latchoff Arming

VRUN/SS Rising from 3V

4.1

4.5

TOP VIEW

G PACKAGE

28-LEAD PLASTIC SSOP

*PGOOD ON LTC1929-PG

RUN/SS

SENSE1+

SENSE1–

EAIN

PLLFLTR

PLLIN

ITH

SGND

VDIFFOUT

VOS–

VOS+

SENSE2–

SENSE2+

TG1

SW1

BOOST1

VIN

BG1

EXTVCC

INTVCC

PGND

BG2

BOOST2

SW2

TG2

AMPMD*

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