amc7580 ETC-unknow, amc7580 Datasheet - Page 8

• Manufacturer Part Number: amc7580
• Description: 7a Low Dropout Regulator
• Manufacturer: ETC-unknow

AMC DOC. #: AMC7580_E (LF)
Feb 2005
The AMC7580-ADJ develops a 1.25V reference voltage between the Sense pin and the Adjust pin (Figure 5).
Placing a resistor between these two terminals causes a constant current to flow thought R1 and down though R2 to
set the output voltage. In general R1 is chosen so that this current is the specified minimum load current of 10 mA.
The current out of the Adjust pin is small, typically 50PA and it adds to the current for R1. For best regulation the
top of the resistor divider should be connected directly to the Sense pin.
Copyright ” 2002, ADD Microtech Corp.
V
POWER
Output Voltage
Figure 5 Setting Output Voltage
ADJ
AMC7580
-ADJ
I
ADJ
V
CONTROL
= 50PA
V
ESR
Effects
ESL
Effects
REF
Slope, V/t = 'I/C
SENSE
R1
R2
V
Point at which regulator
takes control
OUT
Figure 4.
8
V
POWER
Figure 6. Optional Clamp Diodes Protect
7A L
Against Input Crowbar Circuit
Capaci nce
Effects
OW
ta
AMC7580
-ADJ
ADJ
D
ROPOUT
V
CONTROL
AMC7580
R
www.addmtek.com
SENSE
R1
EGULATOR
R2
D1
D2