LT3420_15 datasheet(2/20 Pages) LINER

2 / 20 page

LT3420/LT3420-1

3420fb

RREF

VBAT

RFB

VCC

GND

CHARGE

DONE

SEC

TOP VIEW

MS PACKAGE

10-LEAD PLASTIC MSOP

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage, VCC

●

2.2

2.5

Maximum Operating Voltage, VCC

VCC UVLO Hysteresis

Minimum VBAT Voltage

1.6

1.8

Maximum VBAT Voltage

VBAT UVLO Hysteresis

275

RREF Threshold Voltage

0.98

1.00

1.02

●

0.975

1.025

RREF Pin Bias Current

VRREF = 0V, Switching

µA

VRFB = VBAT – 0.2V (Note 4)

Quiescent Current

VRREF = 1.1V, Not Switching

130

µA

Quiescent Current in Shutdown

VCHARGE = 0V, VIN = 3.3V

0.01

µA

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

VCC Voltage .............................................................. 16V

VBAT Voltage ............................................................ 16V

SW Voltage (Note 2)

LT3420 ................................................................ 38V

LT3420-1 ............................................................ 50V

SEC Current ...................................................... ±200mA

RFB Current ........................................................... ±3mA

RREF Voltage ........................................................... 2.5V

CHARGE Voltage ...................................................... 16V

CT Voltage .............................................................. 1.5V

ABSOLUTE

AXI U

RATI GS

(Note 1)

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

temperature range, otherwise specifications are at TA = 25°C. VCC = VBAT = 3.3V, VCHARGE = VCC unless otherwise noted. (Note 3)

TJMAX = 125°C, θJA = 100°C/W, θJC = 45°C/W

(4-LAYER BOARD)

TOP VIEW

DD PACKAGE

10-LEAD (3mm × 3mm) PLASTIC DFN

CHARGE

DONE

SEC

RREF

VBAT

RFB

VCC

GND

ORDER PART

NUMBER

LT3420EDD

LT3420EDD-1

TJMAX = 125°C, θJA = 43°C/W, θJC = 3°C/W

EXPOSED PAD IS GND (PIN 11)

AND MUST BE SOLDERED TO PCB

PACKAGE/ORDER INFORMATION

DD PART

MARKING

LBJW

LBJX

ORDER PART

NUMBER

MS PART MARKING

LTYH

LTAJG

LT3420EMS

LT3420EMS-1

DONE Voltage .......................................................... 16V

Current into DONE Pin .......................................... ±1mA

Maximum Junction Temperature .......................... 125°C

Operating Ambient Temperature Range

(Note 3) .............................................. – 40°C to 85°C

Storage Temperature Range ................. – 40°C to 125°C

Lead Temperature (Soldering, 10 sec)

(For MS Package only) ..................................... 300°C

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