参数资料
型号: LTC3830EGN#TRPBF
厂商: Linear Technology
文件页数: 1/24页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM VM 16-SSOP
标准包装: 2,500
PWM 型: 电压模式
输出数: 1
频率 - 最大: 250kHz
占空比: 95%
电源电压: 3 V ~ 8 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 85°C
封装/外壳: 16-SSOP(0.154",3.90mm 宽)
包装: 带卷 (TR)
LTC3830/LTC3830-1
High Power Step-Down
Synchronous DC/DC Controllers
for Low Voltage Operation
FEATURES
DESCRIPTIO
High Power Switching Regulator Controller
for 3.3V-5V to 1.xV-3.xV Step-Down Applications
No Current Sense Resistor Required
Low Input Supply Voltage Range: 3V to 8V
Maximum Duty Cycle >91% Over Temperature
All N-Channel External MOSFETs
Excellent Output Regulation: ± 1% Over Line, Load
and Temperature Variations
High Efficiency: Over 95% Possible
Adjustable or Fixed 3.3V Output (16-Pin Version)
Programmable Fixed Frequency Operation: 100kHz to
500kHz
External Clock Synchronization
Soft-Start (16-Pin Version and LTC3830-1)
Low Shutdown Current: <10 μ A
Overtemperature Protection
Available in S8, S16 and SSOP-16 Packages
The LTC ? 3830/LTC3830-1 are high power, high effi-
ciency switching regulator controllers optimized for
3.3V-5V to 1.xV-3.xV step-down applications. A preci-
sion internal reference and feedback system provide
± 1% output regulation over temperature, load current
and line voltage variations. The LTC3830/LTC3830-1 use
a synchronous switching architecture with N-channel
MOSFETs. Additionally, the chip senses output current
through the drain-source resistance of the upper
N-channel FET, providing an adjustable current limit
without a current sense resistor.
The LTC3830/LTC3830-1 operate with an input supply
voltage as low as 3V and with a maximum duty cycle of
>91% over temperature. They include a fixed frequency
PWM oscillator for low output ripple operation. The 200kHz
free-running clock frequency can be externally adjusted or
synchronized with an external signal from 100kHz to 500kHz.
APPLICATIO S
In shutdown mode, the LTC3830 supply current drops to
<10 μ A. The LTC3830-1 differs from the LTC3830 S8 ver-
CPU Power Supplies
Multiple Logic Supply Generator
Distributed Power Applications
High Efficiency Power Conversion
sion by replacing shutdown with a soft-start function.
For a similar, pin compatible DC/DC converter with an
output voltage as low as 0.6V, please refer to the LTC3832.
, LTC and LT are registered trademarks of Linear Technology Corporation.
TYPICAL APPLICATIO
V IN
+
0.1 μ F
0.01 μ F
15k
12.7k 1%
4.7 μ F
LTC3830-1
SS PV CC2
G1
COMP
GND PV CC1
FB G2
3V TO 6V
5.1 ?
MBR0520T1
0.1 μ F
220 μ F
10V
M1
Si7806DN
M2
Si7806DN
L
3.2 μ H
B320A
+
1.8V
9A
C OUT
270 μ F
Efficiency and Power Loss vs Load Current
4.0 100
3.5 90
3.0 80
2.5 70
2.0 60
1.5 50
1.0 40
5.36k 1%
3.3nF
L: SUMIDA CDEP105-3R2MC-88
C OUT : PANASONIC EEFUEOD271R
2V
3830 F01
0.5
0
0
1
2
3 4 5 6 7
LOAD CURRENT (A)
V IN = 3.3V
V OUT = 1.8V
8 9 10
30
20
Figure 1. High Efficiency 3V-6V to 1.8V Power Converter
3830 TA02
3830fa
1
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LTC3830ES 功能描述:IC REG CTRLR BUCK PWM VM 16-SOIC RoHS:否 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:8-TSSOP(0.173",4.40mm 宽) 包装:带卷 (TR)
LTC3830ES#PBF 功能描述:IC REG CTRLR BUCK PWM VM 16-SOIC 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:2,000 系列:- PWM 型:电流模式 输出数:1 频率 - 最大:1MHz 占空比:50% 电源电压:9 V ~ 10 V 降压:无 升压:是 回扫:是 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:8-TSSOP(0.173",4.40mm 宽) 包装:带卷 (TR)
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LTC3830ES#TRPBF 功能描述:IC REG CTRLR BUCK PWM VM 16-SOIC 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)
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