+12V, 30mA Flash Memory
Programming Supply
_____________________________Typical Operating Characteristics (continued)
(Circuit of Figure 3a, T
A
= +25°C, unless otherwise noted.)
LOAD-TRANSIENT RESPONSE
LINE-TRANSIENT RESPONSE
MAX662A
A
A
0mA
0V
B
0V
B
1ms/div
A: OUTPUT CURRENT, 20mA/div, I
OUT
= 0mA to 30mA
B: OUTPUT VOLTAGE RIPPLE, 100mV/div, V
CC
= 5.0V
1ms/div
A: SUPPLY VOLTAGE, 2V/div, V
CC
= 4.5V to 5.5V, I
OUT
= 30mA
B: OUTPUT VOLTAGE RIPPLE, 200mV/div
_____________________Pin Description
PIN
1
2
3
4
5
6
7
NAME
C1-
C1+
C2-
C2+
V
CC
V
OUT
GND
FUNCTION
Negative terminal for the first charge-
pump capacitor
Positive terminal for the first charge-
pump capacitor
Negative terminal for the second
charge-pump capacitor
Positive terminal for the second
charge-pump capacitor
Supply Voltage
+12V Output Voltage. V
OUT
= V
CC
when in shutdown mode.
Ground
Active-high CMOS-logic level
Shutdown Input. SHDN is internally
pulled up to V
CC
. Connect to GND for
normal operation. In shutdown mode,
the charge pumps are turned off and
V
OUT
= V
CC
.
V
CC
C4
4.7µF
V
CC
S1
S2
V
OUT
C2-
S1
ERROR
AMP
R1
C1+
0.22µF
C1-
S1
OSCILLATOR
S1
S2
S2
VREF
SHDN
R2
C2+
0.22µF
C3*
0.1µF
+12V
C5
4.7µF
MAX662A
8
SHDN
GND
SWITCH CLOSURES SHOWN FOR CHARGE PUMP IN THE TRANSFER MODE
* C3 NOT REQUIRED. FOR MAX662 ONLY.
Figure 1. Block Diagram
_______________________________________________________________________________________
3
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
