POSITIVE ADJUSTABLE
VOLTAGE REGULATOR
APPLICATIONS INFORMATION
IP117
IP317A
V
IN
V
IN
ADJ
V
O U T
R
P
(Max Drop 300mV)
OUTPUT
IP117
IP 317A
V
IN
V
IN
ADJ
1µF
2
V
O U T
121Ω
5V
V
O U T
V
IN
7
25
Ω
121
Ω
6
1
LM301A
3
8
4
1k
Ω
R
L
5µF
TTL
1kΩ
2N3904
1kΩ
383Ω
383
Ω
25
Ω
RETURN
RETURN
Remote Sensing
5V Regulator with Shut Down
IP117
IP317A
+24V
V
IN
ADJ
1µF
IP117
IP317A
V
O U T
249
Ω
1%
To V
PP
V
IN
V
IN
ADJ
1µF
V
O U T
R1
121
Ω
5V
750
Ω
1%
R2
383
Ω
C1
10
µF
READ
39k
Ω
3.24k
Ω
1%
WRITE
To OE
BYTE ERASE
18k
Ω
C1 improves ripple rejection
Xc should be small compared to R2
Improving Ripple Rejection
All gates 7406.
V
IN
1N4001
V
IN
ADJ
243
Ω
10k
Ω
50
Ω
CHIP ERASE
100k
Ω
IP317A
IP117
V
O U T
READ
WRITE
BYTE
CHIP ERASE
OE
0V
Vpp
5V
2N3906
THERMALLY
COUPLE
12V
20k
Ω
5V
21V
12V 21V
50k
Ω
2816 EEPROM Supply Programmer for
Read / Write Control
Temperature Compensated
Lead-Acid Battery Charger
Semelab Limited
Coventry Road, Lutterworth, Leicestershire, LE17 4JB
Telephone +44 (0) 1455 556565
Fax +44 (0) 1455 552612
Email:
sales@semelab-tt.com
Website:
http://www.semelab-tt.com
Document Number 8375
Issue 1
Page 6 of 7
SEME-LAB [ SEME LAB ]
