TC660 查看數據表（PDF） - TelCom Semiconductor, Inc
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TC660 Datasheet PDF : 8 Pages
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100mA CHARGE PUMP DC-TO-DC
VOLTAGE CONVERTER
TC660
TYPICAL CHARACTERISTICS (Cont.)
10)
100
Oscillator Frequency
vs. Supply Voltage
LV GROUNDED
11)
12
80
10
LV OPEN
8
60
6
40
FC = V+, OSC = OPEN
4
20
2
Oscillator Frequency
vs. Temperature
FC= OPEN, OSC = OPEN
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
SUPPLY VOLTAGE (V)
0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
12)
100
Oscillator Frequency
vs. Temperature
80
60
40
20
FC = V+, OSC = OPEN
0
-40 -20
0 20 40 60
TEMPERATURE (°C)
80 100
13) Oscillator Frequency
vs. External Capacitance
100
FC = V+
10
1
0.1
FC = OPEN
14) TC7660 and TC660 Output
Voltage and Power Efficiency
vs. Load Current, V+ = 5V
-3.0
TC7660
100
-3.4
-3.8
92
TC660
EFF
84
-4.2
VOUT
76
TC660
-4.6
68
0.01
1 2 5 10 20 100 500 2000 10000
CAPACITANCE (pF)
-5.0
0
TC7660
2.0
40
60
80
LOAD CURRENT (mA)
60
100
PIN DESCRIPTION
Pin No.
1
Symbol
FC
2
CAP+
3
GND
4
CAP–
5
VOUT
6
LV
7
OSC
8
V+
Description
Internal Oscillator frequency control. f ≈ 10 kHz when FC ≈ OPEN; ≈ 90 kHz when
FC = V+. FC has no effect if OSC is overdriven.
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 VIN < 3V; leave
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)
4-8
TELCOM SEMICONDUCTOR, INC.
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