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參數資料
| 型號： | ADP1148AN-3.3 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 穩壓器 |
| 英文描述： | Current-Mode SMPS Controller |
| 中文描述： | SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDIP14 |
| 封裝： | PLASTIC, DIP-14 |
| 文件頁數： | 4/16頁 |
| 文件大小： | 191K |
| 代理商： | ADP1148AN-3.3 |
ADP1148, ADP1148-3.3, ADP1148-5
–4–
REV. A
C AUT ION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the ADP1148, ADP1148-3.3, ADP1148-5 feature proprietary ESD protection circuitry, permanent
damage may occur on devices subjected to high energy electrostatic discharges. T herefore, proper
ESD precautions are recommended to avoid performance degradation or loss of functionality.
PIN FUNCT ION DE SCRIPT IONS
Pin #
Mnemonic
Function
1
P-Channel Drive
High Current Gate Drive for T op P-Channel MOSFET . T he voltage swing at Pin 4 is from V
IN
to
ground.
No Connection.
Input Voltage.
External Capacitor C
T
from Pin 4 to Ground Sets the Operating Frequency. T he frequency is also
dependent on the ratio V
OUT
/V
IN
.
Internal Supply Voltage, Nominally 3.3 V. Must be decoupled to signal ground. Do not externally load
this pin.
Error Amplifier Decoupling Point. T he current comparator threshold increases with the Pin 7 voltage.
Connects to internal resistive divider that sets the output voltage in ADP1148-3.3 and ADP1148-5
versions. Pin 7 is also the (–) input for the current comparator.
T he (+) Input for the Current Comparator. A built-in offset between Pins 7 and 8, in conjunction with
R
SENSE
, sets the current trip threshold.
For the ADP1148 adjustable version, Pin 9 serves as the feedback pin from an external resistive divider
used to set the output voltage. On ADP1148-3.3 and ADP1148-5 versions, this pin is not used.
T aking Pin 10 of the ADP1148, ADP1148-3.3 or ADP1148-5 high holds both MOSFET s off. Must be
at ground potential for normal operation.
Small Signal Ground. Must be routed separately from other grounds to the (–) terminal of C
OUT
.
Driver Power Ground. Connects to source of N-channel MOSFET and the (–) terminal of C
IN
.
No Connection.
High Current Drive for bottom N-channel MOSFET . T he voltage swing at Pin 13 is from ground to
V
IN
.
2
3
4
NC
V
IN
C
T
5
Int V
CC
6
7
I
T H
Sense–
8
Sense+
9
V
FB
10
Shutdown
11
12
13
14
Signal GND
Power GND
NC
N-Channel Drive
PIN CONFIGURAT IONS
14-Lead Plastic DIP
14-Lead Plastic SO
14
13
12
11
10
9
8
1
2
3
4
7
6
5
(TOP VIEW
NC = NO CONNECT
*FIXED OUTPUT VERSIONS = SD1
P-DRIVE
SIGNAL GND
POWER GND
NC
N-DRIVE
NC
V
IN
C
T
ADP1148
SENSE(+)
V
FB
*
SHUTDOWN
INT V
CC
I
TH
SENSE(–)
WARNNG
ESD SENSITIVE DEVICE
相關PDF資料 |
PDF描述 |
|---|---|
| ADP1148AR-3.3 | 10MHz, Rail-to-Rail Input and Output Op Amp in SOT-23; Package: SOT; No of Pins: 5; Temperature Range: 0°C to +70°C |
| ADP1148AR-33 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| ADP1148AR-5 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| ADP1173AN-12 | RECTIFIER SCHOTTKY SINGLE 1A 80V 25A-ifsm 0.8V-vf 0.5mA-ir DO-41 5K/AMMO |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| ADP1148AN-5 | 制造商:Rochester Electronics LLC 功能描述:HIGH EFF SYNCHRONOUS STEP - Bulk |
| ADP1148AR | 制造商:Rochester Electronics LLC 功能描述:HIGH EFF SYNCHRONOUS STEP - Bulk |
| ADP1148AR-3.3 | 制造商:Rochester Electronics LLC 功能描述:HI EFF SYNCHRONOUS STEP D - Bulk |
| ADP1148AR-33 | 制造商:AD 制造商全稱:Analog Devices 功能描述:High Efficiency Synchronous Step-Down Switching Regulators |
| ADP1148AR-5 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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