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参数资料
| 型号： | LTC3801ES6#PBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 650 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | MO-193, PLASTIC, TSOT-23 |
| 文件页数： | 1/12页 |
| 文件大小： | 229K |
| 代理商： | LTC3801ES6#PBF |
1
LTC3801/LTC3801B
sn3801 3801fs
Micropower
Constant Frequency Step-Down
DC/DC Controllers in ThinSOT
s
High Efficiency: Up to 94%
s
Very Low No-Load Quiescent Current:
Only 16
A (LTC3801)
s
High Output Currents Easily Achieved
s
Internal Soft-Start
s
Wide VIN Range: 2.4V to 9.8V
s
Low Dropout: 100% Duty Cycle
s
Constant Frequency 550kHz Operation
s
Burst Mode
Operation for High Efficiency
at Light Loads (LTC3801)
s
Burst Mode Operation Disabled for Lower Output
Ripple at Light Loads (LTC3801B)
s
Output Voltage as Low as 0.8V
s
±1.5% Voltage Reference Accuracy
s
Current Mode Operation for Excellent Line and Load
Transient Response
s
Only 6
A Supply Current in Shutdown (LTC3801)
s
Low Profile (1mm) SOT-23 Package
s
1- or 2-Cell Li-Ion Battery-Powered Applications
s
Wireless Devices
s
Portable Computers
s
Distributed Power Systems
, LTC and LT are registered trademarks of Linear Technology Corporation.
550kHz Micropower Step-Down DC/DC Controller
The LTC
3801/LTC3801B are constant frequency cur-
rent mode step-down DC/DC controllers in a low profile
(1mm max) 6-lead SOT-23 (ThinSOT
TM) package. The
parts provide excellent AC and DC load and line regula-
tion with
±1.5% output voltage accuracy. The LTC3801
consumes only 195
A of quiescent current in normal
operation, dropping to 16
A under no-load conditions.
The LTC3801/LTC3801B incorporate an undervoltage lock-
out feature that shuts down the device when the input
voltage falls below 2.2V. The LTC3801 automatically
switches into Burst Mode operation at light loads which
enhances efficiency at low output current. In the LTC3801B,
Burst Mode operation is disabled for lower output ripple at
light loads.
To further maximize the life of a battery source, the
external P-channel MOSFET is turned on continuously in
dropout (100% duty cycle). High switching frequency of
550kHz allows the use of a small inductor.
Burst Mode is a registered trademark of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
ITH/RUN
LTC3801/
LTC3801B
10k
402k
866k
0.025
4.7
H
220pF
GND
VFB
3801 TA01
PGATE
VIN
SENSE–
10
F
VIN
2.7V TO 9.8V
VOUT
2.5V
2A
47
F
+
LTC3801 Efficiency vs Load Current*
LOAD CURRENT (mA)
0.1
70
EFFICIENCY
(%)
75
80
85
90
1
10
100
10000
1000
3801 TA02
65
60
55
50
95
100
VIN = 3.3V
VIN = 6.6V
VIN = 8.4V
VIN = 9.8V
VOUT = 2.5V
VIN = 4.2V
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
*SEE NO-LOAD IQ vs INPUT VOLTAGE ON THE LAST PAGE OF THIS DATA SHEET
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PDF描述 |
|---|---|
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| LTC3805HMSE-5#TRPBF | SWITCHING CONTROLLER, 700 kHz SWITCHING FREQ-MAX, PDSO10 |
| LTC3805MPMSE-5#PBF | SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO10 |
| LTC3827IG-1 | 3 A DUAL SWITCHING CONTROLLER, 650 kHz SWITCHING FREQ-MAX, PDSO28 |
相关代理商/技术参数 |
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| LTC3802EGN | 功能描述:IC REG CTRLR BUCK PWM VM 28-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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 |
| LTC3802EGN#PBF | 功能描述:IC REG CTRLR BUCK PWM VM 28-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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 |
| LTC3802EGN#TR | 功能描述:IC REG CTRLR BUCK PWM VM 28-SSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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 |
| LTC3802EGN#TRPBF | 功能描述:IC REG CTRLR BUCK PWM VM 28-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:PolyPhase® 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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