LTC3607

1

3607fb

For more information www.linear.com/LTC3607

RUN1

RUN2

SW2

LTC3607

10µF

×2

10µF

121k

10µF

121k

4.7µH

4.7µH

887k

549k

5V AT 600mA

3.3V AT 600mA

3607 TA01a

SVIN

22pF

22pF

SW1

GND

PVIN2

PVIN1

Typical applicaTion

FeaTures

DescripTion

Dual 600mA 15V Monolithic

Synchronous Step-Down

DC/DC Regulator

The LTC®3607 is a 15V dual 600mA monolithic synchro-

nous step-down regulator which has only 55µA quiescent

current. Intended for a variety of applications, including

dual lithium-ion battery products, it operates from a wide

4.5V to 15V input voltage range. It features a constant

2.25MHz switching frequency, enabling the use of tiny,

low cost capacitors and inductors 1mm or less in height.

internal synchronous power switches provide high ef-

ficiency without the need for external Schottky diodes.

A user selectable mode input is provided to allow the user

to trade off ripple noise for light load efficiency; Burst

Mode operation provides the highest efficiency at light

loads, while pulse-skipping mode provides the lowest

ripple noise.

To further the maximize battery run time, the P-channel

MOSFETs are turned on continuously in dropout (100%

duty cycle). In shutdown, the device draws <1µA.

applicaTions

n

High Efficiency: Up to 96%

n

Very Low Quiescent Current: 55µA Total

n

2.25MHz Constant Frequency Operation

n

Low Dropout Operation: 100% Duty Cycle

n

Operation

n

Peak Current-Mode Control Architecture for Excellent

Line and Load Transient Response

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Wide Voltage Input Range: 4.5V to 15V

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600mA/Channel Rated Output Current

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0.6V Reference Allows Low Output Voltages

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±1.5% Output Voltage Accuracy

n

n

Internal Compensation

n

Power Good Outputs

n

Externally Frequency Synchronization (1MHz to 4MHz)

n

Independent Internal Soft-Start for Each Channel

n

Small 16-Lead Thermally Enhanced Thin QFN

(3mm × 3mm) and MSE Packages

n

Dual Lithium-Ion Battery Supplies

n

Automotive Applications

n

Servers

L

, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks

and Hot Swap is a trademark of Linear Technology Corporation. All other trademarks are the

property of their respective owners. Protected by U.S. Patents, including 5481178, 5847554,

6580258, 6304066, 6476589, 6774611.

Efficiency and Power Loss

vs Load Current

LOAD CURRENT (mA)

3607 TA01b

100

90

0.1

1

0.01

0.001

80

60

50

40

30

20

10

70

0

1

100

1000

10