Rainbow Electronics MAX864 - Manual (Page 5)

MAX864
Dual-Output Charge Pump with Shutdown
_______________________________________________________________________________________ 5
____________________________Typical Operating Characteristics (continued)
(V IN = 5.0V, capacitor values in Table 1, T A = +25°C, unless otherwise noted.)
TIME TO EXIT SHUTDOWN
+5V
0V
+10V
0V
-10V
MAX864-19
1ms/div
FC0 = FC1 = IN (185kHz), C1–C4 = 1 µ F
FC0 = FC1 = GND (7kHz), C1–C4 = 33 µ F
_____________________Pin Description
No Connect—no internal connection.
Connect these to ground to improve
thermal dissipation.
N.C.
9, 10,
13, 14
Positive Power-Supply Input IN 12
Output of the Boost Charge Pump V+ 15
Positive Terminal of the Flying Boost
Capacitor
C1+ 16
Output of the Inverting Charge Pump V- 5
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 22
Ω
switch,
and V- connects to GND through a
6
Ω switch.
SHDN 6
Frequency Select, MSB (see Table 1) FC1 7
Frequency Select, LSB (see Table 1) FC0 8
Negative Terminal of the Flying
Inverting Capacitor
C2- 4
Ground (connect pins 3 and 11 together) GND 3, 11
PIN
Positive Terminal of the Flying
Inverting Capacitor
C2+ 2
Negative Terminal of the Flying Boost
Capacitor
C1- 1
FUNCTION NAME
MAX864
C1+
1
2
3
4
5
6
7
8
C1-
16
15
14
13
12
11
10
9
C2
+5V
C1
C3
C4
V
CC
IN
C2+
C2-
GND
V-
SHDN
FC0
FC1
V+ OUT
V- OUT
SEE TABLE 1 FOR CAPACITOR VALUES.
R L-
R
L+
I
L+
V+
N.C.
N.C.
IN
GND
N.C.
N.C.
I L-
Figure 1. Test Circuit