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参数资料
| 型号： | LT3481EMSE#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 10MSOP |
| 标准包装： | 50 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.27 V ~ 20 V |
| 输入电压： | 3.6 V ~ 34 V |
| PWM 型： | 电流模式，混合 |
| 频率 - 开关： | 300kHz ~ 2.8MHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽）裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 10-MSOP 裸露焊盘 |
| 产品目录页面： | 1331 (CN2011-ZH PDF) |
LT3481
PIN FUNCTIONS
BD (Pin 1): This pin connects to the anode of the boost
Schottky diode.
BOOST (Pin 2): This pin is used to provide a drive
voltage, higher than the input voltage, to the internal bipolar
NPN power switch.
SW (Pin 3): The SW pin is the output of the internal power
switch. Connect this pin to the inductor, catch diode and
boost capacitor.
V IN (Pin 4): The V IN pin supplies current to the LT3481’s
internal regulator and to the internal power switch. This
pin must be locally bypassed.
RUN/SS (Pin 5): The RUN/SS pin is used to put the
LT3481 in shutdown mode. Tie to ground to shut down
the LT3481. Tie to 2.3V or more for normal operation. If
the shutdown feature is not used, tie this pin to the V IN
pin. RUN/SS also provides a soft-start function; see the
Applications Information section.
PG (Pin 6): The PG pin is the open-collector output of an
internal comparator. PG remains low until the FB pin is
within 10% of the ?nal regulation voltage. PG output is
valid when V IN is above 3.5V and RUN/SS is high.
BIAS (Pin 7): The BIAS pin supplies the current to the
LT3481’s internal regulator. Tie this pin to the lowest
available voltage source above 3V (typically V OUT ). This
architecture increases ef?ciency especially when the input
voltage is much higher than the output.
FB (Pin 8): The LT3481 regulates the FB pin to 1.265V.
Connect the feedback resistor divider tap to this pin.
V C (Pin 9): The V C pin is the output of the internal error
ampli?er. The voltage on this pin controls the peak switch
current. Tie an RC network from this pin to ground to
compensate the control loop.
RT (Pin 10): Oscillator Resistor Input. Connecting a resistor
to ground from this pin sets the switching frequency.
Exposed Pad (Pin 11): Ground. The Exposed Pad must
be soldered to PCB.
BLOCK DIAGRAM
V IN
C1
4
V IN
7
BIAS
INTERNAL 1.265V REF
BD
1
5
RUN/SS
SLOPE COMP
SWITCH
LATCH
BOOST
2
R T
10
RT
OSCILLATOR
300kHz TO 2.8MHz
R
S
Q
DISABLE
SW
3
C3
L1
V OUT
D1
C2
SOFT-START
Burst Mode
DETECT
6
PG
ERROR AMP
V C CLAMP
+
–
1.12V
+
–
V C
9
C C
GND
11
R2
8
FB
R1
R C
C F
3481 BD
3481fc
7
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3481EMSE-TR | 制造商:LINER 制造商全称:Linear Technology 功能描述:36V, 2A, 2.8MHz Step-Down Switching Regulator with 50μA Quiescent Current |
| LT3481EMSE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:36V, 2A, 2.8MHz Step-Down Switching Regulator with 50μA Quiescent Current |
| LT3481HDD | 制造商:Linear Technology 功能描述:SW REG 36V 2A 2.8MHZ SD 10DFN |
| LT3481HDD#PBF | 功能描述:IC REG BUCK ADJ 2A 10DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 开关稳压器 系列:- 设计资源:Design Support Tool 标准包装:1 系列:- 类型:升压（升压） 输出类型:固定 输出数:1 输出电压:3V 输入电压:0.75 V ~ 2 V PWM 型:- 频率 - 开关:- 电流 - 输出:100mA 同步整流器:是 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-5 细型，TSOT-23-5 包装:剪切带 (CT) 供应商设备封装:TSOT-23-5 其它名称:AS1323-BTTT-30CT |
| LT3481HDD#PBF | 制造商:Linear Technology 功能描述:SW REG 36V 2A 2.8MHZ SD 10DFN |
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