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Description of major ICs
L4959 (RIC1) : Voltage regulator
1.Pin layout
TAB CONNECTED TO PIN 6
2.Block diagram
2/10
V S
8
EN 8V
7
EN 12V(a)
5
EN 12V(b)
D97AU569C
3.Pin function
Pin
Pins
1
OUT 12V (b)
2
3
OUT 5.6V
4
N.C.
5
EN 12V (b)
6
GND
7
EN 12V (a)
8
EN 8.6V
9
OUT 8.6
10
11
OUT 12V (a)
11
10
9
8
7
6
5
4
3
2
1
D97AU716A
REF
GEN
12V/1.3A SWITCHED OUTPUT VOLTAGE
V
Supply Voltage
S
5.6V/250mA OUTPUT VOLTAGE
not connected
Enable 12V/1.3A SWITCHED OUTPUT VOLTAGE
Ground
Enable 12V/0.8A SWITCHED OUTPUT VOLTAGE
Enable 8.6V/0.6A SWITCHED OUTPUT VOLTAGE
8.6V/0.6A SWITCHED OUTPUT VOLTAGE
V
Supply Voltage
S
12V/0.8A SWITCHED OUTPUT VOLTAGE
OUT 12V(a)
V
S
OUT 8.6V
EN 8.6V
EN 12V(a)
GND
EN 12V(b)
N.C.
OUT 5.6V
V
S
OUT 12V(b)
5.6V, 250mA
REGULATOR
8.6V, 600mA
REGULATOR
SWITCHED
12V, 800mA
REGULATOR
SWITCHED
12V, 1.3A
REGULATOR
SWITCHED
Description
MX-K5/MX-K6
3
OUT 5.6V
9
OUT 8.6V
11
OUT 12V(a)
1
OUT 12V(b)
GND
6
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