Step-Down Regulator. LTC3602 Datasheet

LTC3602 Regulator. Datasheet pdf. Equivalent

Part LTC3602
Description Monolithic Synchronous Step-Down Regulator
Feature www.DataSheet4U.com FEATURES n n n n n n n n n n n n LTC3602 2.5A, 10V, Monolithic Synchronous Ste.
Manufacture Linear Technology
Datasheet
Download LTC3602 Datasheet



LTC3602
www.DataSheet4U.com
FEATURES
n Wide Input Voltage Range: 4.5V to 10V
n 2.5A Output Current
n Low RDS(ON) Internal Switches: 65mΩ and 90mΩ
n Programmable Frequency: 300kHz to 3MHz
n Low Quiescent Current: 75μA
n 0.6V ±1% Reference Allows Low Output Voltage
n 99% Maximum Duty Cycle
n Adjustable Burst Mode® Clamp
n Synchronizable to External Clock
n Power Good Output Voltage Monitor
n Overtemperature Protection
n Available in 16-Lead Exposed TSSOP and
4mm × 4mm QFN Packages
APPLICATIONS
n Point-of-Load Supplies
n Portable Instruments
n Server Backplane Power
n Battery-Powered Devices
LTC3602
2.5A, 10V, Monolithic
Synchronous Step-Down
Regulator
DESCRIPTION
The LTC®3602 is a high efficiency, monolithic synchronous,
step-down DC/DC converter utilizing a constant-frequency,
current mode architecture. It operates from an input voltage
range of 4.5V to 10V and provides an adjustable regulated
output voltage from 0.6V to 9.5V while delivering up to
2.5A of output current. The internal synchronous power
switch with 65mΩ on-resistance increases efficiency
and eliminates the need for an external Schottky diode.
The switching frequency can either be set by an external
resistor or synchronized to an external clock. OPTI-LOOP®
compensation allows the transient response to be optimized
over a wide range of loads and output capacitors.
The LTC3602 can be configured for either Burst Mode op-
eration or forced continuous operation. Forced continuous
operation reduces noise and RF interference, while Burst
Mode operation provides the high efficiency at light loads.
In Burst Mode operation, external control of the burst
clamp level allows the output voltage ripple to be adjusted
according to the requirements of the application.
, LT, LTC, LTM, Burst Mode and OPTI-LOOP are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION
3.3V, 2.5A, 1MHz Step-Down Regulator
VIN
4.5V TO 10V
22μF
PVIN
RUN
INTVCC
BOOST
105k
4.32k
1nF
RT
PGOOD LTC3602
TRACK/SS
SW
ITH
SYNC/MODE
PGND
VFB
105k
1μF
0.22μF
2.2μH
VOUT
3.3V
2.5A
100μF
475k
22pF
3602 TA01
Efficiency and Power Loss vs Load Current
100
VIN = 7V
95
90
EFFICIENCY
85
POWER LOSS
80
75
70
65
60
0.01
0.1 1
LOAD CURRENT (A)
10000
1000
100
10
1
10
3602 TA01b
3602fb
1



LTC3602
LTC3602www.DataSheet4U.com
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (PVIN)....................... –0.3V to 11V
SW (DC)...................................... –0.3V to (PVIN + 0.3V)
BOOST ................................. (VSW –0.3V) to (VSW + 6V)
RUN ........................................................... –0.3V to 11V
All Other Pins ............................................... –0.3V to 6V
Peak SW Sink and Source Current (Note 7) .............6.5A
Operating Temperature Range (Note 2)....–40°C to 85°C
Junction Temperature (Notes 5, 6)........................ 125°C
Lead Temperature
(Soldering, FE Package 10 seconds)................. 300°C
PIN CONFIGURATION
TOP VIEW
SYNC/MODE 1
PGOOD 2
RT 3
16 INTVCC
15 PVIN
14 BOOST
ITH 4 17 13 SW
VFB 5
12 SW
RUN 6
11 SW
TRACK/SS 7
10 PGND
PGND 8
9 PGND
FE PACKAGE
16-LEAD PLASTIC TSSOP
TJMAX = 125°C, θJA = 38°C/W, θJC = 10°C/W
EXPOSED PAD (PIN 17) IS SGND, MUST BE SOLDERED TO PCB
TOP VIEW
20 19 18 17 16
PVIN 1
PVIN 2
INTVCC 3
SYNC/MODE 4
PGOOD 5
15 PGND
14 PGND
21 13 PGND
12 PGND
11 TRACK/SS
6 7 8 9 10
UF PACKAGE
20-LEAD (4mm s 4mm) PLASTIC QFN
TJMAX = 125°C, θJA = 37°C/W, θJC = 10°C/W
EXPOSED PAD (PIN 21) IS SGND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC3602EFE#PBF
LTC3602EFE#TRPBF
3602FE
16-Lead Plastic TSSOP
–40°C to 85°C
LTC3602IFE#PBF
LTC3602IFE#TRPBF
3602FE
16-Lead Plastic TSSOP
–40°C to 85°C
LTC3602EUF#PBF
LTC3602EUF#TRPBF
3602
20-Lead (4mm × 4mm) Plastic QFN –40°C to 85°C
LTC3602IUF#PBF
LTC3602IUF#TRPBF
3602
20-Lead (4mm × 4mm) Plastic QFN –40°C to 85°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.
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/
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 8.4V unless otherwise specified.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX
PVIN
VFB
ΔVFB(LINEREG)
ΔVFB(LOADREG)
Operating Voltage Range
Regulated Feedback Voltage
Feedback Voltage Line Regulation
Feedback Voltage Load Regulation
ITH = 0.7V (Note 3)
VIN = 5V to 10V, ITH = 0.7V
ITH = 0.36V to 0.84V
4.5
l 0.594
l
0.6
0.005
0.02
10
0.606
0.1
UNITS
V
V
%/V
%
3602fb
2





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