LTC3831-1 datasheet(2/20 Pages) LINER

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LTC3831-1

38311f

(Note 1)

Supply Voltage

VCC ....................................................................... 9V

PVCC1,2 ................................................................ 14V

Input Voltage

IFB, IMAX ............................................... – 0.3V to 14V

R+, R–, FB, SHDN, FREQSET ..... – 0.3V to VCC + 0.3V

Junction Temperature (Note 9) ............................. 125

°C

Operating Temperature Range (Note 4) .. – 40

°C to 85°C

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

°C to 150°C

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

°C

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ORDER PART

NUMBER

LTC3831EGN-1

TJMAX = 125°C, θJA = 130°C/ W

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VCC

Supply Voltage

358

PVCC

PVCC1, PVCC2 Voltage

(Note 7)

13.2

VUVLO

Undervoltage Lockout Voltage

2.4

2.9

VFB

Feedback Voltage

VR+ = 1.5V, VR– = 0V, VCOMP = 1.25V

0.738

0.75

0.762

∆VOUT

Output Load Regulation

IOUT = 0A to 10A (Note 6)

Output Line Regulation

VCC = 4.75V to 5.25V

0.1

IVCC

Supply Current

Figure 1, VSHDN = VCC

0.7

1.6

VSHDN = 0V

110

µA

IPVCC

PVCC Supply Current

Figure 1, VSHDN = VCC (Note 3)

VSHDN = 0V

0.1

µA

∆fOSC

Internal Oscillator Frequency

FREQSET Floating

230

300

360

kHz

VSAWL

VCOMP at Minimum Duty Cycle

1.2

VSAWH

VCOMP at Maximum Duty Cycle

2.2

VCOMPMAX

Maximum VCOMP

VFB = 0V, PVCC1 = 7V

2.85

∆fOSC/∆IFREQSET Frequency Adjustment

kHz/

µA

Error Amplifier Open-Loop DC Gain

Error Amplifier Transconductance

1600

2000

2400

µmho

ICOMP

Error Amplifier Output Sink/Source Current

100

µA

IMAX

IMAX Sink Current

VIMAX = VCC

912

µA

(Note 10)

412

µA

IMAX Sink Current Tempco

VIMAX = VCC (Notes 6, 10)

3300

ppm/

°C

The q denotes specifications that apply over the full operating temperature

range, otherwise specifications are at TA = 25°C. VCC, PVCC1, PVCC2 = 5V, VR+ = 1.5V, VR– = GND, unless otherwise noted. (Note 2)

ELECTRICAL CHARACTERISTICS

GN PACKAGE

16-LEAD PLASTIC SSOP

TOP VIEW

PVCC1

PGND

GND

R–

R+

SHDN

PVCC2

VCC

IFB

IMAX

FREQSET

COMP

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

GN PART MARKING

38311

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