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参数资料
| 型号： | LT3844EFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR BST INV PWM 16TSSOP |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 330kHz |
| 占空比： | 95% |
| 电源电压： | 4 V ~ 60 V |
| 降压： | 是 |
| 升压： | 是 |
| 回扫： | 无 |
| 反相： | 是 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 包装： | 带卷 (TR) |
LT3844
High Voltage, Current Mode
Switching Regulator Controller with
Programmable Operating Frequency
FEATURES
DESCRIPTION
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High Voltage Operation: Up to 60V
Output Voltages Up to 36V (Step Down)
Programmable Constant Frequency: 100kHz to
500kHz
Synchronizable up to 600kHz
Burst Mode ? Operation: 120μA Supply Current
10μA Shutdown Supply Current
±1.3% Reference Accuracy
Drives N-Channel MOSFET
Programmable Soft-Start
Programmable Undervoltage Lockout
Internal High Voltage Regulator for Gate Drive
Thermal Shutdown
Current Limit Unaffected by Duty Cycle
16-Pin Thermally Enhanced TSSOP Package
The LT ? 3844 is a DC/DC controller used for medium power,
low part count, high ef?ciency supplies. It offers a wide
4V to 60V input range (7.5V minimum start-up voltage)
and can implement step-down, step-up, inverting and
SEPIC topologies.
The LT3844 includes Burst Mode operation, which reduces
quiescent current below 120μA and maintains high ef?-
ciency at light loads. An internal high voltage bias regulator
allows for simple biasing.
Additional features include current mode control for fast
line and load transient response; programmable ?xed
operating frequency that can be synchronized to an ex-
ternal clock for noise sensitive applications; a gate driver
capable of driving large N-channel MOSFETs; a precision
undervoltage lockout function; 10μA shutdown current;
APPLICATIONS
short-circuit protection and a programmable soft-start
function.
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Industrial Power Distribution
12V and 42V Automotive and Heavy Equipment
High Voltage Single Board Systems
Distributed Power Systems
Avionics
Telecom Power
The LT3844 is available in a 16-lead thermally enhanced
TSSOP package.
L , LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Burst Mode is a registered trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents, including 5731694, 6498466, 6611131
TYPICAL APPLICATION
V IN
High Voltage Step-Down Regulator 48V to 12V, 50W
Ef?ciency and Power Loss
vs Load Current
36V TO 60V
68μF
22μF
1M
V IN
BOOST
0.22μF
90
88
V IN = 48V
7
6
82.5k
1000pF
SHDN
C SS
TG
SW
10Ω
Si7850DP
86
84
EFFICIENCY
5
4
14.7k
10k
680p
120pF
BURST_EN
LT3844
V FB
V C
SYNC
V CC
PGND
SENSE +
SENSE –
1μF
10μH
PDS5100H
0.015Ω
68μF
V OUT
12V
50W
33μF
82
80
78
LOSS
3
2
1
130k
R7
f SET
SGND
76
0.1
1
LOAD CURRENT (A)
0
10
49.9k
3844 TA01
3844 TA01b
3844fb
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3844IFE | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Step Down 4V to 60V Input 16-Pin TSSOP EP |
| LT3844IFE#PBF | 功能描述:IC REG CTRLR BST INV PWM 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,500 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:500kHz 占空比:96% 电源电压:4 V ~ 36 V 降压:无 升压:是 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:24-WQFN 裸露焊盘 包装:带卷 (TR) |
| LT3844IFE#TRPBF | 功能描述:IC REG CTRLR BST INV PWM 16TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LT3844IFEPBF | 制造商:Linear Technology 功能描述:DC-DC Controller Step-Down 4-60V TSSOP16 |
| LT3844IFE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:High Voltage, Current Mode Switching Regulator Controller with Programmable Operating Frequency |
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