LTC3423 datasheet(2/12 Pages) LINER

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LTC3423/LTC3424

34234f

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VDD Input Voltage Range

2.7

5.5

VIN Operating Voltage Range

(Note 4)

0.5

5.5

Output Voltage Adjust Range

1.5

5.5

Feedback Voltage

1.22

1.25

1.28

Feedback Input Current

VFB = 1.25V

Quiescent Current—Burst Mode Operation

VC = 0V, MODE/SYNC = 3.3V (Note 3)

µA

Quiescent Current—SHDN

SHDN = 0V, Not Including Switch Leakage

0.1

µA

Quiescent Current—Active

VC = 0V, MODE/SYNC = 0V, Rt = 300k (Note 3)

440

800

µA

NMOS Switch Leakage

0.1

µA

PMOS Switch Leakage

0.1

µA

NMOS Switch On Resistance

0.16

Ω

PMOS Switch On Resistance

0.21

Ω

NMOS Current Limit

LTC3423

1.6

LTC3424

2.8

Maximum Duty Cycle

Rt = 15k

Minimum Duty Cycle

Frequency Accuracy

Rt = 15k

1.6

2.4

MHz

MODE/SYNC Input High

1.4

MODE/SYNC Input Low

0.4

MODE/SYNC Input Current

VMODE/SYNC = 5.5V

0.01

µA

Error Amp Transconductance

∆I = –5µA to 5µA, VC = VFB

µmhos

(Note 1)

VIN, VOUT, VDD Voltages .............................. – 0.5V to 6V

SW Voltage ................................................. – 0.5V to 6V

VC, Rt Voltages ......................... – 0.5V to (VOUT + 0.3V)

SHDN, FB, MODE Voltages ......................... – 0.5V to 6V

Operating Temperature Range (Note 2) .. – 40

°C to 85°C

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

°C to 125°C

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

°C

TJMAX = 125°C

θJA = 130°C/ W 1 LAYER BOARD

θJA = 100°C/ W 4 LAYER BOARD

MS PART MARKING

ORDER PART

NUMBER

LTC3423EMS

LTC3424EMS

LTQM

LTQN

The q denotes specifications that apply over the full operating temperature range, otherwise specifications are at TA = 25°C.

VIN = 1.2V, VDD = 3.3V, VOUT = 1.8V, unless otherwise noted.

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

ELECTRICAL CHARACTERISTICS

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

MODE

VIN

GND

SHDN

VOUT

VDD

TOP VIEW

MS PACKAGE

10-LEAD PLASTIC MSOP

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