LTC1700 datasheet(2/16 Pages) LINER

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LTC1700

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VSOP

Start-Up Minimum Operating Voltage

(Note 4)

0.9

1.8

VOP

Minimum Operating Voltage

(Note 5) VOUT Ramping Up

2.34

2.6

Hysteresis

Input DC Supply Current

(Note 6)

Normal Mode

VFB = 1.6V, VMODE = 0V, VRUN/SS = 3V

536

620

µA

Sleep Mode

VFB = 1.6V, VMODE = 3V, VRUN/SS = 3V

179

210

µA

Start-Up Mode

VFB = 0V, VMODE, VRUN/SS, VOUT = 1.8V

µA

Shutdown

VFB = 0V, VMODE = 3V, VRUN/SS = 0V

µA

IVFB

Feedback Current

VFB = 1.20V

VFB

Regulated Output Voltage

(Note 7)

1.187

1.205

1.223

∆VOSENS

Reference Voltage Line Regulation

VIN = 2.7V to 5V (Note 7)

0.0106

0.080

%/V

VLOADREG

Output Voltage Load Regulation

Measured in Servo Loop; VITH = 0.3V to 0.9V

0.036

0.065

VOVL

Output Overvoltage Lockout

Reference to Nominal VFB

2.5

4.8

VRUN/SS

Shutdown Threshold

VRUN/SS Ramping Up

0.7

1.09

1.2

IRUN/SS

Soft-Start Current Source

VRUN/SS = 0V

3.79

µA

fOSC

Oscillator Frequency

VOUT = 4.2V

460

530

630

kHz

Start-Up Oscillator Frequency

VOUT = 1.8V, VRUN/SS = 1.8V, VSW = 1.1V

150

225

kHz

VSYNC/MODE

SYNC/MODE Threshold

VSYNC/MODE Ramping Down from 1.2V

1.03

1.13

1.25

DC MAX

Maximum Duty Cycle

fOSC = 550kHz

∆VSENSE(MAX)

Maximum Current Sense Voltage

100

ILIMIT

Current Limit At Start-Up

VOUT = 1.8V

Transconductance of Error Amplifier

VFB = VREF ± 10mV

0.65

0.9

1.30

ORDER PART

NUMBER

MS10 PART

MARKING

TJMAX = 125°C, θJA = 150°C/W

LTLC

LTC1700EMS

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. VOUT = 3V unless otherwise specified.

Output Supply Voltage (VOUT) .....................– 0.3V to 6V

RUN/SS, VFB Voltages ..............................–0.3V to 2.4V

SYNC/MODE, ITH Voltages ...........................– 0.3V to 6V

SWITCH Voltage (SW) .............................. – 0.3V to 6.5V

TG, BG Peak Output Current (<10

µs)......................... 1A

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

SGND

ITH

VFB

RUN/SS

SYNC/MODE

PGND

VOUT

TOP VIEW

MS10 PACKAGE

10-LEAD PLASTIC MSOP

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

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