LTC3856



3856f

orDer inForMaTion

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3856EFE#PBF

LTC3856EFE#TRPBF

LTC3856FE

38-Lead Plastic TSSOP

–40°C to 125°C

LTC3856IFE#PBF

LTC3856IFE#TRPBF

LTC3856FE

38-Lead Plastic TSSOP

–40°C to 125°C

LTC3856EUH#PBF

LTC3856EUH#TRPBF

3856

32-Lead (5mm

× 5mm) Plastic QFN

–40°C to 125°C

LTC3856IUH#PBF

LTC3856IUH#TRPBF

3856

32-Lead (5mm

× 5mm) Plastic QFN

–40°C to 125°C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.

Consult LTC Marketing for information on non-standard lead based finish parts.

elecTrical characTerisTics

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Main Control Loops

Input Voltage

4.5

38

V

Output Voltage

0.6

5.0

V

Regulated Feedback Voltage

l

l

0.5955

0.593

0.600

0.600

0.6045

0.607

V

V

Feedback Current

(Note 4)

–15

–50

nA

Reference Voltage Line Regulation

0.002

0.02

%/V

Output Voltage Load Regulation

(Note 4)

Measured in Servo Loop,

Measured in Servo Loop,

l

l

0.01

–0.01

0.1

–0.1

%

%

2.0

mmho

Input DC Supply Current

Normal Mode

Shutdown

(Note 5)

4.0

40

70

mA

µA

Maximum Duty Factor

93

94

%

UVLO

Undervoltage Lockout

l

3.0

3.2

3.4

V

UVLO Hyst

UVLO Hysteresis

0.6

V

Feedback Overvoltage Lockout

l

0.64

0.66

0.68

V

l

±1

±2

µA

DCR Tempco Compensation Current

l

9

10

11

µA

Soft-Start Charge Current

l

1.0

1.25

1.5

µA

RUN Pin On Threshold

l

1.1

1.22

1.35

V

RUN Pin On Hysteresis

80

mV

(E-Grade)

l

l

l

25

45

68

30

50

75

35

55

82

mV

mV

mV

(I-Grade)

l

l

l

23

43

66

30

50

75

37

57

84

mV

mV

mV