900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Analog Devices Semiconductor Electronic Components Datasheet

LTM4691 Datasheet

Dual 2A Step-Down DC/DC uModule Regulator

No Preview Available !

LTM4691
Low VIN, High Efficiency, Dual 2A
Step-Down DC/DC µModule Regulator
FEATURES
n Tiny Surface Mount, Low Profile 3mm × 4mm ×
1.18mm LGA Package
n Input Voltage Range: 2.25V to 3.6V
n Dual 2A DC Output Current
n ±1.5% Total Output Voltage Regulation
n Current Mode Control, Fast Transient Response
n External Frequency Synchronization
n 180° Out-of-Phase Operation
n Selectable Pulse-Skipping Mode/Burst Mode®
Operation/Forced Continuous Mode
n Power Good Indicator
n Internal Soft-Start
n Internal Compensation
n Overvoltage, Overcurrent and Overtemperature
Protection
APPLICATIONS
n Telecom, Networking and Industrial Equipment
n Point-of-Load Regulation
n FPGA, ASIC Core Supplies
DESCRIPTION
The LTM®4691 is a complete dual 2A output switch-
ing mode DC/DC power supply in a tiny 3mm × 4mm
× 1.18mm LGA package. Included in the package are
the switching controller, power FETs, inductors and all
supporting components. Operating over an input voltage
range of 2.25V to 3.6V, the LTM4691 supports two out-
puts with programmable output voltage range from 0.5V
to 2.5V set by external resistors. Its high efficiency design
delivers up to 2A continuous current on each output. Only
bulk input and output capacitors are needed.
The LTM4691 operates in forced continuous mode for low
noise pulse-skipping mode or Burst Mode operation for
high efficiency at lights loads. The typical buck switching
frequency is 2MHz and can be synchronized from 1MHz to
3MHz. Its high switching frequency and a current mode
architecture enables a very fast transient response to line
and load changes without sacrificing stability.
Other features include precision run thresholds, a PGOOD
signal, output overvoltage protection, thermal shutdown
and output short-circuit protection. The LTM4691 is
Pb-free and RoHS compliant.
All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION
VIN
2.25V TO 3.6V
Dual 2A DC/DC μModule Regulator
VIN
10µF
VOUT1
10µF
FB1
RUN1
LTM4691
VIN
VOUT2
RUN2
MODE/SYNC
FB2
GND PGOOD
fSW = 2MHz
4691 TA01a
140k
100k
261k
100k
2.7pF
VOUT1
1.2V, 2A
22µF
1.2pF
VOUT2
1.8V, 2A
22µF
Document Feedback
For more information www.analog.com
Efficiency vs Load Current
100
0.6
EFFICIENCY
90
80
0.5
70
Burst Mode OPERATION
0.4
60 VIN = 3.3V, VOUT = 1.8V
fSW = 2MHz
50 CH1 OFF
0.3
40
30
0.2
20
10
0
0.001
0.1
POWER LOSS
0
0.01
0.1
1
10
LOAD CURRENT (A)
4691 TA01b
Rev. 0
1


Analog Devices Semiconductor Electronic Components Datasheet

LTM4691 Datasheet

Dual 2A Step-Down DC/DC uModule Regulator

No Preview Available !

LTM4691
TABLE OF CONTENTS
Features............................................................................................................................. 1
Applications........................................................................................................................ 1
Typical Application ................................................................................................................ 1
Description......................................................................................................................... 1
Absolute Maximum Ratings...................................................................................................... 3
Order Information.................................................................................................................. 3
Electrical Characteristics......................................................................................................... 3
Pin Configuration.................................................................................................................. 3
Typical Performance Characteristics........................................................................................... 5
Pin Functions....................................................................................................................... 7
Block Diagram...................................................................................................................... 8
Decoupling Requirements........................................................................................................ 8
Operation........................................................................................................................... 9
Applications Information........................................................................................................10
VIN to VOUT Step-Down Ratios............................................................................................................................... 10
Output Voltage Programming................................................................................................................................ 10
Input Decoupling Capacitors.................................................................................................................................. 10
Output Decoupling Capacitors............................................................................................................................... 10
Mode Selection ..................................................................................................................................................... 10
Operating Frequency and External Synchronization .............................................................................................. 11
Power GOOD ......................................................................................................................................................... 11
Output Overvoltage Protection............................................................................................................................... 11
Output Voltage Soft-Start....................................................................................................................................... 12
Dropout Operation ................................................................................................................................................ 12
Output Short-Circuit Protection and Recovery....................................................................................................... 12
Load Sharing......................................................................................................................................................... 12
Using the Precision RUN Threshold ...................................................................................................................... 12
Thermal Considerations and Output Current Derating........................................................................................... 13
Safety Considerations............................................................................................................................................ 16
Layout Checklist/Example...................................................................................................................................... 16
Applications Information........................................................................................................17
Typical Applications..............................................................................................................18
Pin Configuration Table..........................................................................................................20
LTM4691 Component LGA Pinout......................................................................................................................... 20
Package Description.............................................................................................................21
Package Photo....................................................................................................................22
Related Parts......................................................................................................................22
Rev. 0
2
For more information www.analog.com


Part Number LTM4691
Description Dual 2A Step-Down DC/DC uModule Regulator
Maker Analog Devices
Total Page 3 Pages
PDF Download

LTM4691 Datasheet PDF

View PDF for Mobile






Similar Datasheet

1 LTM4691 Dual 2A Step-Down DC/DC uModule Regulator
Analog Devices





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy