EEWORLDEEWORLDEEWORLD

Part Number

Search

LTC3772BETS8#TRMPBF

Description
IC REG CTRLR BUCK TSOT23-8
Categorysemiconductor    Power management   
File Size301KB,20 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric Compare View All

LTC3772BETS8#TRMPBF Overview

IC REG CTRLR BUCK TSOT23-8

LTC3772BETS8#TRMPBF Parametric

Parameter NameAttribute value
Output typetransistor driver
Functionstep down
Output configurationjust
Topologystep down
Number of outputs1
output stage1
Voltage - Power Supply (Vcc/Vdd)2.75 V ~ 9.8 V
Frequency - Switch200kHz ~ 550kHz
Duty cycle (maximum)1
Synchronous rectifiernone
Clock synchronizationnone
serial interface-
Control characteristicscurrent limit, enable
Operating temperature-40°C ~ 85°C(TA)
Package/casingSOT-23-8 thin, TSOT-23-8
Supplier device packagingTSOT-23-8
LTC3772B
Micropower No R
SENSE
Constant Frequency Step-Down
DC/DC Controller
FEATURES
DESCRIPTIO
No Current Sense Resistor Required
High Output Currents Easily Achieved
Internal Soft-Start Ramps V
OUT
Wide V
IN
Range: 2.75V to 9.8V
Low Dropout: 100% Duty Cycle
Constant Frequency 550kHz Operation
Low Ripple Pulse Skipping Operation at Light Load
Output Voltage as Low as 0.8V
±1.5%
Voltage Reference Accuracy
Current Mode Operation for Excellent Line and Load
Transient Response
Only 8µA Supply Current in Shutdown
Low Profile 8-Lead SOT-23 (1mm) and
(3mm
×
2mm) DFN (0.75mm) Packages
The LTC
®
3772B is a constant frequency current mode
step-down DC/DC controller in a low profile 8-lead SOT-23
(ThinSOT
TM
) and a 3mm
×
2mm DFN package. The No
R
SENSE
TM
architecture eliminates the need for a current
sense resistor, improving efficiency and saving board
space.
The LTC3772B automatically switches into pulse skipping
operation at light loads. It consumes only 200µA of quies-
cent current under a no-load condition.
The LTC3772B incorporates an undervoltage lockout fea-
ture that shuts down the device when the input voltage
falls below 2V. To maximize the runtime from a battery
source, the external P-channel MOSFET is turned on
continuously in dropout (100% duty cycle). High switch-
ing frequency of 550kHz allows the use of a small inductor
and capacitors. An internal soft-start smoothly ramps the
output voltage from zero to its regulation point.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
ThinSOT and No R
SENSE
are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by
U.S. Patents including 5731694, 6127815.
APPLICATIO S
1- or 2-Cell Li-Ion Battery-Powered Applications
Wireless Devices
Portable Computers
Distributed Power Systems
TYPICAL APPLICATIO
680pF
20k
I
TH
/RUN
GND
82.5k
V
FB
SW
V
IN
LTC3772B
PGATE
550kHz Micropower Step-Down DC/DC Converter
V
IN
2.75V TO 9.8V
10µF
Efficiency and Power Loss vs Load Current
(Figure 5 Circuit)
100
90
80
70
EFFICIENCY
1
10
EFFICIENCY (%)
3.3µH
47µF
V
OUT
2.5V
2A
60
50
40
30
POWER LOSS
0.01
V
IN
= 3.3V
V
IN
= 5V
1
10
100
1000
LOAD CURRENT (mA)
0.1
22pF
174k
3772B TA01
20
10
0
U
0.001
10000
U
U
POWER LOSS (W)
3772B TA01b
3772bfa
1

LTC3772BETS8#TRMPBF Related Products

LTC3772BETS8#TRMPBF LTC3772BETS8#TRPBF LTC3772BEDDB#TRPBF LTC3772BEDDB#TRMPBF
Description IC REG CTRLR BUCK TSOT23-8 IC REG CTRLR BUCK TSOT23-8 IC REG CTRLR BUCK 8DFN IC REG CTRLR BUCK 8DFN
Output type transistor driver transistor driver transistor driver -
Function step down step down step down -
Output configuration just just just -
Topology step down step down step down -
Number of outputs 1 1 1 -
output stage 1 1 1 -
Voltage - Power Supply (Vcc/Vdd) 2.75 V ~ 9.8 V 2.75 V ~ 9.8 V 2.75 V ~ 9.8 V -
Frequency - Switch 200kHz ~ 550kHz 200kHz ~ 550kHz 200kHz ~ 550kHz -
Duty cycle (maximum) 1 1 1 -
Synchronous rectifier none none none -
Clock synchronization none none none -
Control characteristics current limit, enable current limit, enable current limit, enable -
Operating temperature -40°C ~ 85°C(TA) -40°C ~ 85°C(TA) -40°C ~ 85°C(TA) -
Package/casing SOT-23-8 thin, TSOT-23-8 SOT-23-8 thin, TSOT-23-8 8-WFDFN Exposed Pad -
Supplier device packaging TSOT-23-8 TSOT-23-8 8-DFN(3x2) -
【TI's First Low Power Design Competition】Play Hijack (5): Flirting - Logic Gate Experiment
[i=s]This post was last edited by sacq on 2014-11-29 16:27[/i] Gossip: Although it is winter, I still want to gossip about how much "spinach" you have harvested (sent out) in the past autumn? Here I w...
sacq Microcontroller MCU
When will ST release the second generation Cortex-M3?
When will ST release the second generation Cortex-M3? It is said to be faster, and LPC1700 can reach 120M.In addition, the HSI oscillator on the chip should not be divided before entering the PLL! Or ...
seawave2000 stm32/stm8
Understanding setup and hold times for high-speed digital-to-analog converters (DACs)
To achieve the best performance from high-speed digital-to-analog converters ( DACs) , strict timing requirements for digital signals must be met . As clock frequencies increase, setup and hold times ...
sairvee Analog electronics
Modern power module and device application technology
In the past 20 years, the rapid development of power devices and their packaging technology has led to great changes in the field of power electronics technology. Today's market requires power electro...
zbz0529 Power technology
Pressure sensor, proximity switch, inductive, capacitive sensor schematics
For other sensor schematics, please contact QQ307558793...
hxixi2227 Sensor
Do you know how to define IER and IFR?
IER and IFR do not define addresses because they are CPU registers, and only memory has a clear address. Just define it like this in the header file: extern cregister volatile unsigned int IFR; extern...
安_然 DSP and ARM Processors

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 211  548  1748  1786  2045  5  12  36  42  33 
Datasheet   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
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号