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參數(shù)資料
| 型號(hào)： | ADP3422JRU |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 電源管理 |
| 英文描述： | Secondary Over-Voltage Protection for 2-4 cell in series Li-Ion/Poly (4.40V) 8-SM8 -40 to 110 |
| 中文描述： | 5-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO28 |
| 封裝： | TSSOP-28 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大小： | 174K |
| 代理商： | ADP3422JRU |
REV. 0
ADP3422
–8–
ADOPT is a trademark of Analog Devices, Inc.
Pin No.
Mnemonic
Function
25
RAMP
Regulation Ramp Feedback Input. This is a high-impedance analog input pin which is used for providing
negative feedback of the hysteretically-controlled output. Several switched current sources also
appear at this input, most notably the cycle-by-cycle hysteresis-setting switched current programmed by
the HYSSET pin. The external resistive termination at this pin sets the magnitude of the hysteresis
applied to the regulation loop.
Regulation Voltage Summing Input. This is a high-impedance analog input pin into which the voltage
reference of the feedback loop allows the summing of both the DACOUT voltage and the core voltage for
programming the output resistance of the core voltage regulator. This is also the pin at which an optimized
transient response can be tailored using Analog Devices’ patented ADOPT design technique.
Current Limit Positive Sense. This is a high-impedance analog input pin that is normally connected to the
positive node of the current sense resistor.
Current Limit Negative Sense. This is a high-impedance analog input pin that is normally connected via
a current-limit programming resistor to the negative node of the current sense resistor. A hysteretically-
controlled current—three times the current programmed at the HYSSET pin—flows out of this pin
and develops a current-limit-setting voltage across that resistor. This voltage must be exceeded by the
inductor current generated current sense voltage in order to trigger the current limit function. When it is
triggered, the current flowing out of this pin is reduced—to two-thirds of its previous value—producing
hysteresis in the current limit operation.
26
REG
27
CS+
28
CS–
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