REV. –4–
ADM660/ADM8660
Doubler Configuration (ADM660 Only)
Mnemonic Function
FC Frequency Control Input for Internal Oscillator
and Charge Pump. With FC = Open, f
CP
=
25 kHz; with FC = V+, f
CP
= 120 kHz.
CAP+ Positive Charge-Pump Capacitor Terminal.
GND Positive Input Supply.
CAP– Negative Charge-Pump Capacitor Terminal.
OUT Ground.
LV Low Voltage Operation Input. Connect to OUT.
OSC Must be left unconnected in this mode.
V+ Doubled Positive Output.
PIN CONNECTIONS
8-Lead
1
2
3
4
8
7
6
5
TOP VIEW
(Not to Scale)
ADM660
FC
OUT
LV
OSC
V+
CAP+
GND
CAP–
1
2
3
4
8
7
6
5
TOP VIEW
(Not to Scale)
ADM8660
FC
OUT
LV
SD
V+
CAP+
GND
CAP–
16-Lead
14
13
12
11
16
15
10
9
8
1
2
3
4
7
6
5
TOP VIEW
(Not to Scale)
ADM660
NC = NO CONNECT
NC
OSC
V+
NC
NC
NC
FC
CAP+
NC
OUT
LVGND
CAP–
NC
NC
NC
Inverter Configuration
Mnemonic Function
FC Frequency Control Input for Internal Oscillator
and Charge Pump. With FC = Open (ADM660)
or connected to GND (ADM8660), f
CP
= 25 kHz;
with FC = V+, f
CP
= 120 kHz.
CAP+ Positive Charge-Pump Capacitor Terminal.
GND Power Supply Ground.
CAP– Negative Charge-Pump Capacitor Terminal.
OUT Output, Negative Voltage.
LV Low Voltage Operation Input. Connect to GND
when input voltage is less than 3.5 V. Above
3.5 V, LV may be connected to GND or left
unconnected.
OSC ADM660: Oscillator Control Input. OSC is
connected to an internal 15 pF capacitor. An
external capacitor may be connected to slow the
oscillator. An external oscillator may also be
used to overdrive OSC. The charge-pump
frequency is equal to 1/2 the oscillator frequency.
SD ADM8660: Shutdown Control Input. This in-
put, when high, is used to disable the charge
pump thereby reducing the power consumption.
V+ Positive Power Supply Input.
PIN FUNCTION DESCRIPTIONS
