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LT3668HMSE#PBF

Description
IC REG TRPL BUCK/LINEAR 16MSOP
Categorysemiconductor    Power management   
File Size423KB,28 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric Compare View All

LT3668HMSE#PBF Overview

IC REG TRPL BUCK/LINEAR 16MSOP

LT3668HMSE#PBF Parametric

Parameter NameAttribute value
TopologyBuck (1), Linear (LDO) (2)
Functionany function
Number of outputs3
Frequency - Switch250kHz ~ 2.2MHz
Voltage/Current - Output 11.2 V ~ 39.4 V,400mA
Voltage/Current - Output 21.1 V ~ 10 V,200mA
Voltage/Current - Output 31.1 V ~ 10 V,200mA
With LED drivernone
With monitornone
with sequencernone
Voltage - Power1.6 V ~ 40 V
Operating temperature-40°C ~ 150°C
Installation typesurface mount
Package/casing16-TFSOP (0.118", 3.00mm wide) exposed pad
Supplier device packaging16-MSOP-EP
FEATURES
n
LT3668
40V 400mA Step-Down
Switching Regulator with Dual
Fault Protected Tracking LDOs
DESCRIPTION
The
LT
®
3668
is a monolithic triple power supply composed
of a 400mA buck switching regulator and two 200mA low
dropout linear tracking regulators (LDOs).This provides a
complete and robust power solution for applications that
require the power supply of a sensor to tightly track the
power supply of a measurement ASIC.
Each tracking LDO supplies 200mA of output current with
a typical dropout voltage of 340mV, and each LDO has an
accurate resistor programmable current limit.
Internal protection circuitry includes reverse-battery
protection, current limiting, thermal limiting and reverse
current protection.
The buck regulator includes a high efficiency switch, a
boost diode, and the necessary oscillator, control and
logic circuitry. Current mode topology is used for fast
transient response and good loop stability. Low ripple
Burst Mode operation maintains high efficiency at low
output currents while keeping output ripple below 15mV
in a typical application.
The LT3668 is available in a thermally-enhanced 16-lead
MSOP package with exposed pad for low thermal resistance.
n
n
n
n
n
n
Dual Low Dropout Linear Tracking Regulators
n
200mA Outputs with Programmable Current Limits
n
1.6V to 45V Input Range
n
Fault Protected to ±45V
Triple Output Supply from a Single Input Requires
Only One Inductor
I
Q
= 50μA at 12V
IN
to 6V and 5V with No Load
Buck Regulator:
®
n
Low Ripple (<15mV
P-P
) Burst Mode Operation
n
400mA Output with Internal Power Switch
n
4.3V to 40V Input Operation Range (60V Max)
Adjustable 250kHz to 2.2MHz Switching Frequency
Power Good Indicator
Available in a Thermally-Enhanced 16-Lead
MSOP Package
APPLICATIONS
n
n
n
Fault-Protected Sensor Supply
Automotive and Industrial Supplies
Power for Portable Instrumentation
L,
LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks
of Linear Technology Corporation. All other trademarks are the property of their respective
owners.
TYPICAL APPLICATION
V
IN
7V TO 40V
TRANSIENT
TO 60V
No-Load Supply Current
4.7µF
IN1
BOOST
SW
DA
IN3/BD
IN2
FB1
ADJ2
ADJ3
OUT3
10µF
3668 TA01a
0.22µF 27µH
232k
100
6V
100mA
22µF
90
80
SUPPLY CURRENT (µA)
70
60
50
40
30
20
10
0
5
10
25
20
15
INPUT VOLTAGE (V)
30
35
ON OFF
EN
PG
RT
LT3668
22pF
931k
294k
f = 600kHz
5V
150mA
(FOLLOWS
OUT3)
174k
OUT2
10µF
EN2/ILIM2 GND EN3/ILIM3
5V
150mA
3668 TA01b
3668fa
For more information
www.linear.com/LT3668
1

LT3668HMSE#PBF Related Products

LT3668HMSE#PBF LT3668 LT3668IMSE#PBF LT3668HMSE#TRPBF LT3668EMSE#PBF LT3668EMSE#TRPBF LT3668IMSE#TRPBF
Description IC REG TRPL BUCK/LINEAR 16MSOP 40v 400ma step-down switching regulator with dual fault protected tracking ldos LT3668 - 40V 400mA Step-Down Switching Regulator with Dual Fault Protected Tracking LDOs; Package: MSOP; Pins: 16; Temperature Range: -40°C to 85°C IC REG TRPL BUCK/LINEAR 16MSOP LT3668 - 40V 400mA Step-Down Switching Regulator with Dual Fault Protected Tracking LDOs; Package: MSOP; Pins: 16; Temperature Range: -40°C to 85°C IC REG TRPL BUCK/LINEAR IC REG TRPL BUCK/LINEAR
Topology Buck (1), Linear (LDO) (2) - - Buck (1), Linear (LDO) (2) - Buck (1), Linear (LDO) (2) Buck (1), Linear (LDO) (2)
Function any function - - any function - any function any function
Number of outputs 3 - - 3 - 3 3
Frequency - Switch 250kHz ~ 2.2MHz - - 250kHz ~ 2.2MHz - 250kHz ~ 2.2MHz 250kHz ~ 2.2MHz
Voltage/Current - Output 1 1.2 V ~ 39.4 V,400mA - - 1.2 V ~ 39.4 V,400mA - 1.2 V ~ 39.4 V,400mA 1.2 V ~ 39.4 V,400mA
Voltage/Current - Output 2 1.1 V ~ 10 V,200mA - - 1.1 V ~ 10 V,200mA - 1.1 V ~ 10 V,200mA 1.1 V ~ 10 V,200mA
Voltage/Current - Output 3 1.1 V ~ 10 V,200mA - - 1.1 V ~ 10 V,200mA - 1.1 V ~ 10 V,200mA 1.1 V ~ 10 V,200mA
With LED driver none - - none - none none
With monitor none - - none - none none
with sequencer none - - none - none none
Voltage - Power 1.6 V ~ 40 V - - 1.6 V ~ 40 V - 1.6 V ~ 40 V 1.6 V ~ 40 V
Operating temperature -40°C ~ 150°C - - -40°C ~ 150°C - -40°C ~ 125°C -40°C ~ 125°C
Installation type surface mount - - surface mount - surface mount surface mount
Package/casing 16-TFSOP (0.118", 3.00mm wide) exposed pad - - 16-TFSOP (0.118", 3.00mm wide) exposed pad - 16-TFSOP (0.118", 3.00mm wide) exposed pad 16-TFSOP (0.118", 3.00mm wide) exposed pad
Supplier device packaging 16-MSOP-EP - - 16-MSOP-EP - 16-MSOP-EP 16-MSOP-EP
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