TC660 TELCOM [TelCom Semiconductor, Inc], TC660 Datasheet - Page 4

• Manufacturer Part Number: TC660
• Description: 100mA CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
• Manufacturer: TELCOM [TelCom Semiconductor, Inc]

4-8
TYPICAL CHARACTERISTICS (Cont.)
13)
TC660
10)
PIN DESCRIPTION
0.01
100
100
0.1
10
80
60
40
20
Pin No.
1
0
1.0
1 2 5
vs. External Capacitance
1
2
3
4
5
6
7
8
1.5
Oscillator Frequency
Oscillator Frequency
vs. Supply Voltage
SUPPLY VOLTAGE (V)
LV GROUNDED
2.0
10
FC = V + , OSC = OPEN
CAPACITANCE (pF)
2.5 3.0 3.5 4.0 4.5 5.0 5.5
20
100
FC = OPEN
Symbol
CAP
CAP
GND
V
OSC
500
FC
LV
V
OUT
+
LV OPEN
+
–
FC = V +
2000
10000
11)
14)
-3.8
-4.2
-4.6
-5.0
-3.0
Description
Internal Oscillator frequency control. f
FC = V
External capacitor, + terminal
Power-Supply Ground (Inverter) or Positive Input (Doubler)
External capacitor, – terminal
Negative Voltage output (Inverter) or Ground (Doubler)
"Low-Voltage" pin. Connect to GND Pin for inverter operation when V
open or GND above 3V. When overdriving OSC, connect to GND.
For external control of internal OSC. Connect ext. C from OSC to GND (close to pkg.)
to reduce frequency of oscillator
Positive Voltage Input (Inverter) or Output (Doubler)
-3.4
12
10
4
2
6
0
8
-40
0
Voltage and Power Efficiency
TC7660 and TC660 Output
vs. Load Current, V
+
-20
. FC has no effect if OSC is overdriven.
Oscillator Frequency
2.0
TC7660
vs. Temperature
FC= OPEN, OSC = OPEN
TEMPERATURE ( C)
0
LOAD CURRENT (mA)
40
TC7660
20
EFF
V OUT
40
60
60
100mA CHARGE PUMP DC-TO-DC
+ =
80
TC660
80
TC660
5V
100
100
100
92
84
76
68
60
10 kHz when FC
12)
TELCOM SEMICONDUCTOR, INC.
100
VOLTAGE CONVERTER
80
60
40
20
-40
0
-20
Oscillator Frequency
vs. Temperature
FC = V + , OSC = OPEN
TEMPERATURE ( C)
OPEN;
0
20
40
90 kHz when
IN
< 3V; leave
60
80
100