MAX864 Maxim, MAX864 Datasheet - Page 5

• Manufacturer Part Number: MAX864
• Description: Dual-Output Charge Pump with Shutdown
• Manufacturer: Maxim

_____________________Pin Description
(V
____________________________Typical Operating Characteristics (continued)
IN
13, 14
9, 10,
3, 11
PIN
12
15
16
= 5.0V, capacitor values in Table 1, T
1
2
4
5
6
7
8
NAME
SHDN
GND
N.C.
C2+
FC1
FC0
C1+
C2-
C1-
V+
IN
V-
Dual-Output Charge Pump with Shutdown
_______________________________________________________________________________________
Negative Terminal of the Flying Boost
Capacitor
Positive Terminal of the Flying
Inverting Capacitor
Ground (connect pins 3 and 11 together)
Negative Terminal of the Flying
Inverting Capacitor
Output of the Inverting Charge Pump
Active-Low Shutdown Input. With
SHDN low, the part is in shutdown
mode and its supply current is less
than 1µA. In shutdown mode, V+
connects to IN through a 22Ω switch,
and V- connects to GND through a
6Ω switch.
Frequency Select, MSB (see Table 1)
Frequency Select, LSB (see Table 1)
No Connect—no internal connection.
Connect these to ground to improve
thermal dissipation.
Positive Power-Supply Input
Output of the Boost Charge Pump
Positive Terminal of the Flying Boost
Capacitor
FUNCTION
A
= +25°C, unless otherwise noted.)
+10V
-10V
+5V
0V
0V
FC0 = FC1 = GND (7kHz), C1–C4 = 33 F
FC0 = FC1 = IN (185kHz), C1–C4 = 1 F
TIME TO EXIT SHUTDOWN
1ms/div
Figure 1. Test Circuit
C2
V
CC
+5V
SEE TABLE 1 FOR CAPACITOR VALUES.
IN
C1
1
2
3
4
5
6
7
8
C1-
C2+
GND
C2-
V-
SHDN
FC1
FC0
MAX864
GND
N.C.
N.C.
N.C.
N.C.
C1+
V+
IN
16
15
14
13
12
11
10
9
C3
C4
I
I
L+
L-
R
R
L+
L-
V+ OUT
V- OUT
5