LTC3448 datasheet(2/20 Pages) LINER

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LTC3448

3448f

LTC3448EDD

TJMAX = 125°C, θJA = 43°C/ W

EXPOSED PAD (PIN 9) IS GND

MUST BE SOLDERED TO PCB

ORDER PART

NUMBER

Input Supply Voltage .................................. – 0.3V to 6V

RUN, SYNC Voltages ................... – 0.3V to (VIN + 0.3V)

MODE Voltage ............................. – 0.3V to (VIN + 0.3V)

FREQ, VFB Voltages...................... – 0.3V to (VIN + 0.3V)

SW Voltage .................................. – 0.3V to (VIN + 0.3V)

VOUT Voltage ................................ – 0.3V to (VIN + 0.3V)

P-Channel Switch Source Current (DC) ............. 800mA

N-Channel Switch Sink Current (DC) ................. 800mA

DD PART MARKING

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

LBMJ

ABSOLUTE

AXI U

RATI GS

PACKAGE/ORDER I FOR ATIO

(Note 1)

VOUT (LDO) Source Current .................................. 25mA

Peak SW Sink and Source Current ........................ 1.3A

Operating Temperature Range (Note 2) .. – 40

°C to 85°C

Junction Temperature (Notes 3, 7) ...................... 125

°C

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

°C to 125°C

Lead Temperature (Soldering, 10 sec)

MSOP Only ...................................................... 300

°C

TOP VIEW

DD PACKAGE

8-LEAD (3mm

× 3mm) PLASTIC DFN

VFB

VOUT

MODE

VIN

RUN

SYNC

FREQ

LTC3448EMS8E

ORDER PART

NUMBER

MS8 PART MARKING

LTBMK

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

IVFB

Feedback Current

●

±30

VFB

Regulated Feedback Voltage

TA = 25°C

0.5880

0.6

0.6120

(Note 4)

°C ≤ TA ≤ 85°C

0.5865

0.6

0.6135

–40

°C ≤ TA ≤ 85°C

●

0.5850

0.6

0.6150

∆VFB

Reference Voltage Line Regulation

VIN = 2.5V to 5.5V (Note 4)

●

0.2

0.4

%/V

∆VOVL

Output Overvoltage Lockout

∆VOVL = VOVL – VFB

∆VOVL = (VOVL – VOUT) • 100/VOUT

2.5

5.8

9.2

∆VOUT

Output Voltage Line Regulation

VIN = 2.5V to 5.5V (LDO)

0.1

0.8

%/V

IPK

Peak Inductor Current

VFB = 0.5V or VOUT = 90%,

0.7

1.3

Duty Cycle < 35%

VLOADREG

Output Voltage Load Regulation

LDO, 1mA to 10mA

0.5

%/V

VOUT(MAX)

Maximum Output Voltage

(Note 9)

VIN – 0.7 VIN – 0.3

VIN

Input Voltage Range

●

2.5

5.5

The

● denotes specifications which apply over the full operating

temperature range, otherwise specifications are TA = 25°C. VIN = 3.6V unless otherwise specified.

ELECTRICAL CHARACTERISTICS

VFB

VOUT

MODE

VIN

RUN

SYNC

FREQ

TOP VIEW

MS8E PACKAGE

8-LEAD PLASTIC MSOP

TJMAX = 125°C, θJA = 40°C/ W

EXPOSED PAD (PIN 9) IS GND

MUST BE SOLDERED TO PCB

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