EZ1580 Semtech Corporation, EZ1580 Datasheet - Page 4

• Manufacturer Part Number: EZ1580
• Description: DUAL INPUT LOW DROPOUT REGULATOR
• Manufacturer: Semtech Corporation

February 26, 1999
TYPICAL APPLICATIONS
NOTES:
(1) Capacitor values are for reference only. Good quality, low ESR tantalum or aluminum electrolytic capacitors
should be used. Increasing the value of the output capacitor will improve the overall transient response.
(2) If the same voltage is input to both POWER and CONTROL, then the dropout voltage will become 1.3V maxi-
mum.
(3) A small (~0.033µF) capacitor can be used to bypass the ADJUST pin to improve transient response, if needed.
© 1999 SEMTECH CORP.
Adjustable Output Parts
Fixed Output Parts
5V CONTROL IN
3.3V POWER IN
(3)
GROUND
5V CONTROL IN
3.3V CONTROL IN
3.3V POWER IN
2.5V POWER IN
(1)(2)
GROUND
GROUND
C1
33uF
DUAL INPUT
LOW DROPOUT REGULATOR
C1
33uF
C1
47uF
V
5
4
C2
10uF
OUT
POWER
CONTROL
U1
5
4
C2
10uF
5
4
V
C2
10uF
POWER
CONTROL
SENSE
REF
1
U1
2
ADJ
POWER
CONTROL
U1
æ
ç
è
1
OUTPUT
EZ158XCX
SENSE
652 MITCHELL ROAD NEWBURY PARK CA 91320
1
GND
2
SENSE
1
GND
2
R
R
2
1
OUTPUT
EZ158XCX-2.5
OUTPUT
3
ö
EZ158XCX-1.5
I
ADJ
3
3
R1
124
R2
124
VREF
R
2
C3
68uF
C3
100uF
2.5V OUT
GROUND
1.5V OUT
GROUND
C3
68uF
2.5V OUT
GROUND
EZ1580/EZ1581
EZ1582/EZ1583
4