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参数资料
| 型号： | LT3800EFE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 9/24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
APPLICATIONS INFORMATION
The onboard V CC regulator will provide gate drive power
for start-up under all conditions with total MOSFET gate
Charge Pump Doubler
V OUT
charge loads up to 180nC. The regulator can operate the
B0520
B0520
LT3800 continuously, provided the V IN voltage and/or
MOSFET gate charge currents do not create excessive
power dissipation in the IC. Safe operating conditions
for continuous regulator use are shown in Figure 1. In
applications where these conditions are exceeded, V CC
LT3800
V CC
BG
1μF
1μF
Si1555DL
must be derived from an external source after start-up.
70
Charge Pump Tripler
V OUT
60
B0520
B0520
1μF
50
40
V CC
B0520
1μF
30
1μF
Si1555DL
Si1555DL
LT3800
20
SAFE
OPERATING
CONDITIONS
BG
3800 AI01
10
0
50 100 150
200
TOTAL FET GATE CHARGE (nC)
3800 F01
Figure 1. V CC Regulator Continuous Operating Conditions
In LT3800 converter applications with output voltages in
the 9V to 20V range, back-feeding V CC and V BOOST from
Inductor Auxiliary Winding
TG
SW
the converter output is trivial, accomplished by connect-
ing diodes from the output to these supply pins. Deriving
LT3800
V CC
?
N
V OUT
these supplies from output voltages greater than 20V will
?
require additional regulation to reduce the feedback voltage.
Outputs lower than 9V will require step-up techniques to
BG
3800 AI04
increase the feedback voltage to something greater than
the 8V V CC regulated output. Low power boost switchers
are sometimes used to provide the step-up function, but
a simple charge-pump can perform this function in many
instances.
3800fc
9
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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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