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参数资料
| 型号： | LTC3805MPMSE#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING REGULATOR, 700 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封装： | LEAD FREE, PLASTIC, MSOP-10 |
| 文件页数： | 18/20页 |
| 文件大小： | 248K |
| 代理商： | LTC3805MPMSE#TRPBF |
LTC3805
7
3805ff
BLOCK DIAGRAM
SSFLT (Pin 1): Soft-Start Pin. A capacitor placed from
this pin to GND (Exposed Pad) controls the rate of rise of
converter output voltage during start-up. This capacitor is
also used for time out after a fault prior to restart.
ITH (Pin 2): Error Amplifier Compensation Point. Normal
operating voltage range is clamped between 0.7V and
1.9V.
FB (Pin 3): Receives the feedback voltage from an external
resistor divider across the output.
RUN (Pin 4): An external resistor divider connects this pin
to VIN and sets the thresholds for converter operation.
FS (Pin 5): A resistor connected from this pin to ground
sets the frequency of operation.
SYNC (Pin 6): Input to synchronize the oscillator to an
external source.
ISENSE (Pin 7): Performs two functions: for current mode
control, it monitors the switch current, using the voltage
across an external current sense resistor. Pin 7 also injects
a current ramp that develops slope compensation voltage
across an optional external programming resistor.
OC (Pin 8): Overcurrent Pin. Connect this pin to the ex-
ternal switch current sense resistor. An additional resistor
programs the overcurrent trip level.
VCC(Pin9):SupplyPin.Acapacitormustcloselydecouple
VCC to GND (Exposed Pad).
GATE (Pin 10): Gate Drive for the External N-channel
MOSFET. This pin swings from GND to VCC.
GND (Exposed Pad Pin 11): Ground. A capacitor must
closely decouple GND to VCC (Pin 9). The exposed pad
must be soldered to electrical ground on PCB for electrical
contact and rated thermal performance.
–
+
–
+
–
+
SLOPE
COMP
CURRENT
RAMP
VCC
RUN
GATE
DRIVER
GATE
7
ISENSE
3805 BD
OSCILLATOR
Q
R
CURRENT
COMPARATOR
OVERCURRENT
COMPARATOR
SHUTDOWN
ITH CLAMPS
S
20mV
ITH
ERROR
AMPLIFIER
FB
SOFT-START RAMP
10A
100mV
SWITCHING
LOGIC AND
BLANKING
CIRCUIT
10
3
SSFLT
1
OC
8
GND
1.2V
11
2
SYNC
FS
5
6
9
4
UNDERVOLTAGE
LOCKOUT
800mV
REFERENCE
SOFT-START
FAULT
PIN FUNCTIONS
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC3806EDE | 功能描述:IC REG CTRLR FLYBACK PWM 12-DFN 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) |
| LTC3806EDE#PBF | 功能描述:IC REG CTRLR FLYBACK PWM 12-DFN 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) |
| LTC3806EDE#TR | 功能描述:IC REG CTRLR FLYBACK PWM 12-DFN 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) |
| LTC3806EDE#TRPBF | 功能描述:IC REG CTRLR FLYBACK PWM 12-DFN 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) |
| LTC3808EDE | 制造商:Linear Technology 功能描述:DC DC Cntrlr Single-OUT Sync Step Down 2.75V to 9.8V Input 14-Pin DFN EP |
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