LTC3336

1

Rev. A

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TYPICAL APPLICATION

FEATURES

DESCRIPTION

15V/250mA Nanopower Buck

DC/DC with Programmable

Peak Input Current

The LTC®3336 is a compact high efficiency nanopower

hysteretic buck DC/DC which can deliver up to 250mA of

output current from a 2.5V to 15V input. Input quiescent

current is typically 65nA with the output in regulation at

no load for output voltages less than 2.4V; this number

is reduced further for higher output voltages at which

internal circuits can be boot-strapped from the output.

Performance specifications are ideal for primary (i.e.,

non-rechargeable) battery powered applications: low IQ

plus the ability to set the peak current to a level matched

to the battery’s maximum capacity point.

The peak input currents of 10mA, 30mA, 100mA, and

300mA are pin selectable as well as the output voltages

of 1.2V, 1.5V, 1.6V, 1.8V, 2.0V, 2.4V, 2.5V, 2.8V, 3.0V,

3.2V, 3.3V, 3.6V, 3.7V, 4.1V, 4.2V, and 5.0V.

The LTC3336 is offered in a compact 12-lead 2mm × 2mm

LQFN or an ultra compact 12-ball 1.18mm × 1.62mm

WLCSP package.

LTC3336

LQFN, IPEAK = 10mA/30mA/100mA/300mA

LTC3336-1

WLCSP, IPEAK = 10mA/30mA

LTC3336-2

WLCSP, IPEAK = 100mA/300mA

Efficiency vs ILOAD

VOUT = 2.5V, IPEAK = 300mA

APPLICATIONS

n

Input Voltage Range: 2.5V to 15V

n

Output Current: Up to 250mA

n

IVIN = 65nA (In Regulation, No Load)

n

Output Voltage Range: 1.2V to 5V

n

16 Fixed Output Voltages Programmed via

4 Pin-Strapped Inputs

n

4 Peak VIN Currents Programmed via 2 Pin-

Strapped Inputs (10mA/30mA/100mA/300mA)

n

Low IQ Dropout Mode

n

Power Good (PGOOD) Output

n

12-Lead 2mm × 2mm LQFN and 12-Ball 1.18mm ×

1.62mm Chip Scale (WLCSP) Packages

n

Low Power Primary Battery Powered Systems (e.g.,

1× to 3× Li-Ion Primary, 3× to 8× AAA)

n

Remote Industrial Sensors (e.g., Meters, Alarms)

n

Asset Trackers

n

Electronic Door Locks

n

Keep-Alive Supplies/Battery Backup

n

SmartMesh® Applications

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3336 TA01a

+

LTC3336

VIN

IPK1

IPK0

EN

SW

VOUT

PGOOD

INTVCC GND

L

33 H

2.5V/250mA

COUT

100 F

6.3V

2×

LiSOCl2

CIN

0.1 F

10V

OUT2

OUT3

OUT1

OUT0

COUT = 100µF

VIN = 3.6V, L = 15µH

VIN = 7.2V, L = 33µH

VIN = 15V, L = 47µH

LOAD CURRENT (A)

100n

1µ

10µ 100µ 1m 10m 100m

1

0

10

20

30

40

50

60

70

80

90

100

3336 TA01b