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Linear Technology Electronic Components Datasheet

LTC3607 Datasheet

Dual 600mA 15V Monolithic Synchronous Step-Down DC/DC Regulator

No Preview Available !

Features
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 Low-Ripple (Typical 30mVP-P) Burst Mode®
Operation
n Peak Current-Mode Control Architecture for Excellent
Line and Load Transient Response
n Wide Voltage Input Range: 4.5V to 15V
n 600mA/Channel Rated Output Current
n 0.6V Reference Allows Low Output Voltages
n ±1.5% Output Voltage Accuracy
n Ultralow Shutdown Current: IQ < 1µA
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
Applications
n Dual Lithium-Ion Battery Supplies
n Automotive Applications
n Servers
LTC3607
Dual 600mA 15V Monolithic
Synchronous Step-Down
DC/DC Regulator
Description
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.
Each output voltage is adjustable from 0.6V to VIN. The
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.
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.
Typical Application
VIN 12V
VOUT1
5V AT 600mA
10µF
×2
4.7µH
22pF
PVIN1 SVIN PVIN2
RUN1
RUN2
SW1 LTC3607 SW2
4.7µH
22pF
887k
10µF
121k
VFB1
VFB2
GND
549k
121k
VOUT2
3.3V AT 600mA
10µF
3607 TA01a
For more information www.linear.com/LTC3607
Efficiency and Power Loss
vs Load Current
100
90
VIN = 12V
1
80
70 0.1
60
50
40
30 0.01
20
10
0
VOUT = 5V
VOUT = 3.3V 0.001
1 10 100 1000
LOAD CURRENT (mA)
3607 TA01b
3607fb
1


Linear Technology Electronic Components Datasheet

LTC3607 Datasheet

Dual 600mA 15V Monolithic Synchronous Step-Down DC/DC Regulator

No Preview Available !

LTC3607
Absolute Maximum Ratings
(Note 1)
PVIN, SVIN Voltages..................................... –0.3V to 15V
RUN1, RUN2 Voltages.................. –0.3V to (SVIN + 0.3V)
VFB1, VFB2 Voltages.................................... –0.3V to 3.6V
MODE/SYNC Voltage.................................. –0.3V to 3.6V
PGOOD1, PGOOD2 Voltages....................... –0.3V to 15V
Operating Junction Temperature Range
(Notes 2, 7)............................................. –40°C to 125°C
Storage Temperature Range.................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MSOP Package.................................................. 300°C
Pin Configuration
TOP VIEW
MODE/SYNC 1
PGOOD1 2
SVIN 3
PGND1 4
16 15 14 13
12 SGND
17
PGND
11 PGOOD2
10 SGND
9 PGND2
5678
UD PACKAGE
16-LEAD (3mm × 3mm) PLASTIC QFN
TJMAX = 125°C, θJA = 68°C/W, θJC = 7.5°C/W
EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB
PGSNVDIN1
1
2
SW1 3
PPSVVWIINN212
4
5
6
PGND2 7
SGND 8
TOP VIEW
17
PGND
16 PGOOD1
15 MODE/SYNC
14 RUN1
13
12
11
VVRFFUBBN122
10 SGND
9 PGOOD2
MSE PACKAGE
16-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 37°C/W, θJC = 10°C/W
EXPOSED PAD (PIN 17) IS PGND, MUST BE SOLDERED TO PCB
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3607EUD#PBF
LTC3607EUD#TRPBF LFNB
16-Lead (3mm × 3mm) Plastic QFN
–40°C to 125°C (Note 2)
LTC3607IUD#PBF
LTC3607IUD#TRPBF
LFNB
16-Lead (3mm × 3mm) Plastic QFN
–40°C to 125°C (Note 2)
LTC3607EMSE#PBF
LTC3607EMSE#TRPBF 3607
16-Lead Plastic MSOP
–40°C to 125°C (Note 2)
LTC3607IMSE#PBF
LTC3607IMSE#TRPBF 3607
16-Lead Plastic MSOP
–40°C to 125°C (Note 2)
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.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
3607fb
2 For more information www.linear.com/LTC3607


Part Number LTC3607
Description Dual 600mA 15V Monolithic Synchronous Step-Down DC/DC Regulator
Maker Linear
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LTC3607 Datasheet PDF






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