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參數資料
| 型號： | ADP3025 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | High Efficiency Dual Output Power Supply Controller |
| 中文描述： | 高效率雙輸出電源控制器 |
| 文件頁數： | 7/24頁 |
| 文件大小： | 609K |
| 代理商： | ADP3025 |
ADP3025
Pin No.
19
Rev. A | Page 7 of 24
Mnemonic
PFI
Function
Negative Input of a Comparator that can be Used as a Power-Fail Detector. The positive input is connected to
the 800 mV reference. There is a 14 mV hysteresis for this comparator.
Power Failure Output, Open Drain Output. This pin sinks current when the PFI pin is lower than 800 mV.
Otherwise, PFO is floating.
Power Good Output. PWRGD goes low with no delay whenever the 5 V output drops 7% below its nominal
value. When the 5 V output is within –3% of its nominal value, PWRGD is released after a time delay determined
by the timing capacitor on the CPOR pin.
Power-On Reset Capacitor. Connect a capacitor between CPOR and AGND to set the delay time for the PWRGD
pin. A 1 μA pull-up current is used to charge the capacitor. A manual reset (MR) function can also be achieved
by pulling this pin low.
Compensation Input for the Linear Regulator Controller. Connect an RC network to GND for stable operation.
This pin is also used as an ON/OFF pin of the linear regulator controller.
Feedback for the Linear Regulator Controller.
NMOS Gate Drive Output for the Linear Regulator Controller.
Boost Capacitor Connection for High-Side Driver of the 3.3 V Buck Converter.
High-Side Gate Drive for the 3.3 V Buck Converter.
Switching Node (Inductor) Connection of the 3.3 V Buck Converter.
Low-Side Gate Drive of the 3.3 V Buck Converter.
Main Supply Input (5.5 V to 25 V).
Power Ground. Pins 32 and 34 must be connected together for proper operation.
Shutdown Control Input, Active Low. If SD = 0 V, the chip is in shutdown mode with very low quiescent current.
For automatic startup, connect SD to VIN via a resistor.
Low-Side Gate Drive for the 5 V Buck Converter.
Switching Node (Inductor) Connection for the 5 V Buck Converter.
High-Side Gate Drive for the 5 V Buck Converter.
Boost Capacitor Connection for the High-Side Driver of the 5 V Buck Converter.
20
PFO
21
PWRGD
22
CPOR
23
COMP2/SD2
24
25
26
27
28
29
30
32, 34
33
FB2
DRV2
BST3
DRVH3
SW3
DRVL3
VIN
PGND2, 1
SD
35
36
37
38
DRVL5
SW5
DRVH5
BST5
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相關代理商/技術參數 |
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| ADP3025JRU | 制造商:Analog Devices 功能描述:DC DC CNTRLR DUAL-OUT SYNC BUCK 5.5V TO 25V 38TSSOP - Bulk |
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