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參數(shù)資料
| 型號(hào)： | TC1227 |
| 廠(chǎng)商： | Microchip Technology Inc. |
| 英文描述： | Inverting Dual (-VIN, -2VIN) Charge Pump Voltage Converters |
| 中文描述： | 反相雙（- VIN，這- 2VIN）電荷泵電壓轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 2/10頁(yè) |
| 文件大?。?/td> | 1194K |
| 代理商： | TC1227 |
2
Inverting Dual (
–
V
IN
,
–
2V
IN
)
Charge Pump Voltage Converters
TC1225
TC1226
TC1227
TC1225/6/7-1 3/24/00
2001 Microchip Technology Inc. DS21369A
PIN DESCRIPTION
Pin Number
Name
Description
1
2
3
4
5
6
7
8
C1–
C2+
C2–
–2V
IN
GND
V
IN
C1+
–V
IN
C1 Commutation Capacitor Negative Terminal.
C2 Commutation Capacitor Positive Terminal.
C2 Commutation Capacitor Negative Terminal.
Doubling Inverting Charge Pump Output (–2 x V
IN
).
Ground.
Positive Power Supply Input.
C1 Commutation Capacitor Positive Terminal.
Inverting Charge Pump Output (–1 x V
IN
).
ABSOLUTE MAXIMUM RATINGS*
Input Voltage (V
IN
to GND)......................... +6.0V, – 0.3V
Output Voltage (–V
IN
, –2V
IN
to GND)........ –12.0V, + 0.3V
Current at –V
IN
, –2V
IN
Pins ......................................10mA
Short-Circuit Duration –V
IN
, –2V
IN
to GND ........ Indefinite
Operating Temperature Range ...............– 40
°
C to +85
°
C
Power Dissipation (T
A
≤
70
°
C) MSOP-8 ...............320mW
Storage Temperature (Unbiased) .........– 65
°
C to +150
°
C
Lead Temperature (Soldering, 10sec) ..................+260
°
C
*This is a stress rating only and functional operation of the device at these
or any other conditions above those indicated in the operational sections
of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS:
T
A
= –40
°
C to +85
°
C, V
IN
= +5V, C1 = 3.3
μ
F, C2 = 1
μ
F (TC1225); C1 = 1
μ
F,
C2 = 0.33
μ
F (TC1226); C1 = 0.33
μ
F, C2 = 0.1
μ
F (TC1227) unless otherwise noted. Typical values are at T
A
= +25
°
C.
Symbol Parameter
Device
Test Conditions
Min
Typ
Max
Unit
I
DD
Supply Current
TC1225
TC1226
TC1227
—
—
—
1.8
75
200
625
—
120
360
1500
—
μ
A
V
MIN
Minimum Supply Voltage All
R
LOAD
= 1k
for –V
IN
output
R
LOAD
= 10k
for –2V
IN
output
R
LOAD
= 1k
for –V
IN
output
R
LOAD
= 10k
for –2V
IN
output
V
V
MAX
Maximum Supply Voltage All
—
—
5.5
V
F
OSC
Oscillator Frequency
TC1225
TC1226
TC1227
All
8.4
24.5
65
96
12
35
125
99.5
15.6
45.5
170
—
kHz
V
EFF1
Voltage Conversion
Efficiency (Stage 1)
Voltage Conversion
Efficiency (Stage 2)
Output Resistance
for –V
IN
output (Note 1)
Output Resistance
for –2V
IN
output (Note 1)
NOTES:
1. Capacitor contribution is approximately 20% of the
output impedance [ESR = 1/ pump frequency x capacitance)].
R
LOAD
=
∞
for –V
IN
output
R
LOAD
=
∞
for –2V
IN
output
R
LOAD
=
∞
for –V
IN
output
R
LOAD
=
∞
for –2V
IN
output
I
LOAD
= 0.5mA to 5mA
No Load at -2V
IN
Output
I
LOAD
= 0.1mA to 1mA
No Load at -V
IN
Output
%
V
EFF2
All
94
99
—
%
R
OUT1
All
—
45
80
R
OUT2
All
—
135
420
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