- 您现在的位置：买卖IC网 > PDF目录13843 > LT3972IDD#PBF (Linear Technology)IC REG BUCK ADJ 3.5A 10DFN PDF资料下载
参数资料
| 型号： | LT3972IDD#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 7/24页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 3.5A 10DFN |
| 标准包装： | 121 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.79 V ~ 30 V |
| 输入电压： | 3.6 V ~ 33 V |
| PWM 型： | 电流模式，Burst Mode? |
| 频率 - 开关： | 230kHz ~ 2.45MHz |
| 电流 - 输出： | 3.5A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-WFDFN 裸露焊盘 |
| 包装： | 管件 |
| 供应商设备封装： | 10-DFN（3x3） |
LT3972
PIN FUNCTIONS
BD (Pin 1): This pin connects to the anode of the boost
Schottky diode. BD also supplies current to the internal
regulator.
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 LT3972’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
LT3972 in shutdown mode. Tie to ground to shut down
the LT3972. Tie to 2.5V 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.
SYNC (Pin 6): This is the external clock synchronization
input. Ground this pin for low ripple Burst Mode operation at
low output loads. Tie to a clock source for synchronization.
Clock edges should have rise and fall times faster than 1μs.
Tie Pin to GND if not used. See Synchronization section
in Applications Information.
PG (Pin 7): The PG pin is the open-collector output of an
internal comparator. PG remains low until the FB pin is
within 9% of the ?nal regulation voltage. PG output is valid
when V IN is above 3.6V and RUN/SS is high.
FB (Pin 8): The LT3972 regulates the FB pin to 0.790V.
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
INTERNAL 0.79V REF
BD
1
5
RUN/SS
SLOPE COMP
SWITCH
LATCH
BOOST
2
R T
10
6
RT
SYNC
OSCILLATOR
200kHzTO2.4MHz
R
Q
S
DISABLE
Burst Mode
SW
3
C3
D1
L1
C2
V OUT
SOFT-START
DETECT
7
PG
ERROR AMP
V C CLAMP
GND
+
–
0.725V
FB
+
–
V C
9
C C
R C
C F
11
R2
8
R1
3972 BD
3972fa
7
相关PDF资料 |
PDF描述 |
|---|---|
| GSC31DREF-S13 | CONN EDGECARD 62POS .100 EXTEND |
| MAX6716AUTRHD2+T | IC SUPERVISOR MPU SOT23-6 |
| GMC31DREF-S13 | CONN EDGECARD 62POS .100 EXTEND |
| MAX6716AUTRVD1+T | IC SUPERVISOR MPU SOT23-6 |
| RBC60DCMH | CONN EDGECARD 120POS .100 WW |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3972IDD-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:33V, 3.5A, 2.4MHz Step-Down Switching Regulator with 75μA Quiescent Current |
| LT3972IMSE#PBF | 功能描述:IC REG BUCK ADJ 3.5A 10MSOP 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 |
| LT3972IMSE#TRPBF | 功能描述:IC REG BUCK ADJ 3.5A 10MSOP 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 |
| LT3972IMSEPBF | 制造商:Linear Technology 功能描述:DC-DC Converter Step-Down 3.6-33V MSOP10 |
| LT3972IMSE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:33V, 3.5A, 2.4MHz Step-Down Switching Regulator with 75μA Quiescent Current |
发布紧急采购，3分钟左右您将得到回复。