参数资料
型号: LTC3832-1ES8#TR
厂商: Linear Technology
文件页数: 7/24页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM VM 8-SOIC
标准包装: 2,500
PWM 型: 电压模式
输出数: 1
频率 - 最大: 360kHz
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: 8-SOIC(0.154",3.90mm 宽)
包装: 带卷 (TR)
LTC3832/LTC3832-1
PI FU CTIO S
FREQSET (Pin 11/NA): Frequency Set. Use this pin to
adjust the free-running frequency of the internal oscillator.
With the pin floating, the oscillator runs at about 300kHz.
A resistor from FREQSET to ground speeds up the oscil-
lator; a resistor to V CC slows it down.
I MAX (Pin 12/NA): Current Limit Threshold Set. I MAX sets
the threshold for the internal current limit comparator. If
I FB drops below I MAX with G1 on, the LTC3832 goes into
current limit. I MAX has an internal 12 μ A pull-down to GND.
Connect this pin to the main V IN supply at the drain of Q1,
through an external resistor to set the current limit thresh-
old. Connect a 0.1 μ F decoupling capacitor across this
resistor to filter switching noise.
I FB (Pin 13/NA): Current Limit Sense. Connect this pin to
the switching node at the source of Q1 and the drain of Q2
through a 1k resistor. The 1k resistor is required to prevent
voltage transients from damaging I FB .This pin is used for
sensing the voltage drop across the upper N-channel
MOSFET, Q1.
V CC (Pin 14/Pin 7): Power Supply Input. All low power
internal circuits draw their supply from this pin. Connect
this pin to a clean power supply, separate from the main
V IN supply at the drain of Q1. This pin requires a 4.7 μ F
bypass capacitor. The LTC3832-1has V CC and PV CC2 tied
together at Pin 7 and requires a 10 μ F bypass capacitor to
GND.
PV CC2 (Pin 15/Pin 7): Power Supply Input for G2. Connect
this pin to the main high power supply.
G2 (Pin 16/Pin 8): Bottom Gate Driver Output. Connect
this pin to the gate of the lower N-channel MOSFET, Q2.
This output swings from PGND to PV CC2 . It remains low
when G1 is high or during shutdown mode. To prevent
output undershoot during a soft-start cycle, G2 is held low
until G1 first goes high (FFBG in the Block Diagram).
BLOCK DIAGRA
(LTC3832)
SHDN
100 μ s DELAY
INTERNAL
LOGIC AND
THERMAL SHUTDOWN
POWER DOWN
DISABLE GATE DRIVE
OSCILLATOR
PV CC1
FREQSET
PWM
S
R
Q
Q
G1
PV CC2
COMP
FFBG
G2
12 μ A
S
Q
ENABLE
PGND
SS
QSS
POR
R
G2
V CC
ERR
MAX
+
+
GND
FB
V REF
V REF + 10%
18k
SENSE +
5.7k
CC
I FB
SENSE –
V REF
2.2V
+
12 μ A
I MAX
V REF + 10%
BG
3832 BD
QC
1.2V
DISABLE
I LIM
V
+
PV CC1
V CC + 2.5V
sn3832 3832fs
7
相关PDF资料
PDF描述
VE-B2Z-EW-F1 CONVERTER MOD DC/DC 2V 40W
LT1950EGN#TRPBF IC REG CTRLR PWM CM 16-SSOP
LT1950EGN#TR IC REG CTRLR PWM CM 16-SSOP
ASC05DRYI-S93 CONN EDGECARD 10POS DIP .100 SLD
LTC3866EUF#TRPBF IC REG CTRLR BUCK PWM CM 24-QFN
相关代理商/技术参数
参数描述
LTC3832EGN 功能描述:IC REG CTRLR BUCK PWM VM 16-SSOP 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:2,500 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)
LTC3832EGN#PBF 功能描述:IC REG CTRLR BUCK PWM VM 16-SSOP 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)
LTC3832EGN#TR 功能描述:IC REG CTRLR BUCK PWM VM 16-SSOP 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:2,500 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)
LTC3832EGN#TRPBF 功能描述:IC REG CTRLR BUCK PWM VM 16-SSOP 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)
LTC3832EG-T 制造商:LINEAR TECHNOLOGY CORPORA 功能描述: 制造商:LINTEC 功能描述: