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参数资料
| 型号： | LT3800EFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/24页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR INV PWM CM 16-TSSOP |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 220kHz |
| 占空比： | 95% |
| 电源电压： | 4 V ~ 60 V |
| 降压： | 是 |
| 升压： | 无 |
| 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) |
LT3800
High-Voltage Synchronous
Current Mode Step-Down
Controller
FEATURES
DESCRIPTION
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Wide 4V to 60V Input Voltage Range
Output Voltages up to 36V
Adaptive Nonoverlap Circuitry Prevents Switch
Shoot-Through
Reverse Inductor Current Inhibit for Discontinuous
Operation Improves Ef?ciency with Light Loads
Output Slew Rate Controlled Soft-Start with
Auto-Reset
100μA No Load Quiescent Current
Low 10μA Current Shutdown
1% Regulation Accuracy
200kHz Operating Frequency
Standard Gate N-Channel Power MOSFETs
Current Limit Unaffected by Duty Cycle
Reverse Overcurrent Protection
16-Lead Thermally Enhanced TSSOP Package
The LT ? 3800 is a 200kHz ?xed frequency high voltage
synchronous current mode step-down switching regulator
controller. The IC drives standard gate N-channel power
MOSFETs and can operate with input voltages from 4V to
60V. An onboard regulator provides IC power directly from
V IN and provides for output-derived power to minimize
V IN quiescent current. MOSFET drivers employ an internal
dynamic bootstrap feature, maximizing gate-source “ON”
voltages during normal operation for improved operating
ef?ciencies. The LT3800 incorporates Burst Mode ? opera-
tion, which reduces no load quiescent current to under
100μA. Light load ef?ciencies are also improved through
a reverse inductor current inhibit, allowing the controller
to support discontinuous operation. Both Burst Mode
operation and the reverse-current inhibit features can be
disabled if desired. The LT3800 incorporates a program-
APPLICATIONS
mable soft-start that directly controls the voltage slew rate
of the converter output for reduced startup surge currents
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12V and 42V Automotive and Heavy Equipment
48V Telecom Power Supplies
Avionics and Industrial Control Systems
Distributed Power Converters
and overshoot errors. The LT3800 is available in a 16-lead
thermally enhanced TSSOP package.
L , LT, LTC, LTM, Linear Technology, Burst Mode and the Linear logo are registered trademarks
and No R SENSE and ThinSOT are trademarks of Linear Technology Corporation. All other
trademarks are the property of their respective owners. Protected by U.S. Patents including
5481178, 6611131, 6304066, 6498466, 6580258.
TYPICAL APPLICATION
12V 75W DC/DC Converter with Reverse Current Inhibit and Input UVLO
V IN
20V TO 55V
+
56μF
× 2
V IN
BOOST
1μF
1μF
× 3
100
95
Ef?ciency and Power Loss
V IN = 24V
V IN = 36V
6
5
82.5k
20k
1%
1M
1.5nF
174k
1%
200k
LT3800
SHDN
C SS
BURST_EN
V FB
TG
SW
V CC
BG
BAS19
1μF
1N4148
Si7850DP
Si7370DP
15μH
B160
90
85
80
75
V IN = 60V
V IN = 48V
L OSS (48V)
4
3
2
1
V C
PGND
100pF
82.5k
SENSE –
SENSE +
70
0.1
1
10
0
680pF
SGND
0.015Ω
I LOAD (A)
3800 TA01b
V OUT
10μF
+
12V AT 75W
270μF
3800 TA01a
3800fc
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3800IFE | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 4V to 60V 16-Pin TSSOP EP |
| LT3800IFE#PBF | 功能描述:IC REG CTRLR INV PWM CM 16-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 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:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
| LT3800IFE#PBF | 制造商:Linear Technology 功能描述:IC SYNC STEP-DOWN REGULATOR CTRL 16-TSSO |
| LT3800IFE#TR | 制造商:Linear Technology 功能描述:Conv DC-DC Single Step Down 4V to 60V 16-Pin TSSOP EP T/R |
| LT3800IFE#TRPBF | 功能描述:IC REG CTRLR INV PWM CM 16-TSSOP 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 |
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