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参数资料
| 型号： | LTC3830-1ES8#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 6/24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： | 250kHz |
| 占空比： | 95% |
| 电源电压： | 3 V ~ 8 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 ~ 85°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
LTC3830/LTC3830-1
TYPICAL PERFOR A CE CHARACTERISTICS
PV CC Supply Current
vs Gate Capacitance
G1 Rise/Fall Time
vs Gate Capacitance
Transient Response
50
T A = 25 ° C
200
180
T A = 25 ° C
40
PV CC1,2 = 12V
160
140
V OUT
50mV/DIV
30
20
PV CC1,2 = 5V
120
100
80
60
t f AT PV CC1,2 = 5V
t r AT PV CC1,2 = 5V
I LOAD
2AV/DIV
10
40
20
t f AT PV CC1,2 = 12V
t r AT PV CC1,2 = 12V
50 μ s/DIV
3830 G22.tif
0
0
1 2 3
4 5
6 7
8
9
10
0
0
1
2
3
4
5
6 7
8
9
10
GATE CAPACITANCE AT G1 AND G2 (nF)
3830 G20
GATE CAPACITANCE AT G1 AND G2 (nF)
3830 G21
PI FU CTIO S
(16-Lead LTC3830/8-Lead LTC3830/LTC3830-1)
G1 (Pin 1/Pin 1/Pin 1): Top Gate Driver Output. Connect
this pin to the gate of the upper N-channel MOSFET, Q1.
This output swings from PGND to PV CC1 . It remains low if
G2 is high or during shutdown mode.
PV CC1 (Pin 2/Pin 2/Pin 2): Power Supply Input for G1.
Connect this pin to a potential of at least V IN + V GS(ON)(Q1) .
This potential can be generated using an external supply or
charge pump.
PGND (Pin 3/Pin 3/Pin 3): Power Ground. Both drivers
return to this pin. Connect this pin to a low impedance
ground in close proximity to the source of Q2. Refer to the
Layout Consideration section for more details on PCB
layout techniques. The LTC3830-1 and the 8-lead LTC3830
have PGND and GND tied together internally at Pin 3.
GND (Pin 4/Pin 3/Pin 3): Signal Ground. All low power
internal circuitry returns to this pin. To minimize regula-
tion errors due to ground currents, connect GND to PGND
right at the LTC3830.
SENSE – , FB, SENSE + (Pins 5, 6, 7/Pin 4/Pin 4): These
three pins connect to the internal resistor divider and input
of the error amplifier. To use the internal divider to set the
output voltage to 3.3V, connect SENSE + to the positive
terminal of the output capacitor and SENSE – to the nega-
tive terminal. FB should be left floating. To use an external
resistor divider to set the output voltage, float SENSE + and
SENSE – and connect the external resistor divider to FB.
The internal resistor divider is not included in the LTC3830-1
and the 8-lead LTC3830.
SHDN (Pin 8/Pin 5/NA): Shutdown. A TTL compatible low
level at SHDN for longer than 100 μ s puts the LTC3830 into
shutdown mode. In shutdown, G1 and G2 go low, all
internal circuits are disabled and the quiescent current
drops to 10 μ A max. A TTL compatible high level at SHDN
allows the part to operate normally. This pin also doubles
as an external clock input to synchronize the internal
oscillator with an external clock. The shutdown function is
disabled in the LTC3830-1.
SS (Pin 9/NA/Pin 5): Soft-Start. Connect this pin to an
external capacitor, C SS , to implement a soft-start function.
If the LTC3830 goes into current limit, C SS is discharged
to reduce the duty cycle. C SS must be selected such that
during power-up, the current through Q1 will not exceed
the current limit level. The soft-start function is disabled in
the 8-lead LTC3830.
COMP (Pin 10/Pin 6/Pin 6): External Compensation. This
pin internally connects to the output of the error amplifier
and input of the PWM comparator. Use a RC + C network
at this pin to compensate the feedback loop to provide
optimum transient response.
3830fa
6
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3830EGN | 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: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 |
| LTC3830EGN#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:2,000 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) |
| LTC3830EGN#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) |
| LTC3830EGN#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) |
| 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) |
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