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参数资料
| 型号： | TC1222ECHRT |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 950 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | EIAJ, SC-74, SOT-23A, 6 PIN |
| 文件页数： | 3/10页 |
| 文件大小： | 108K |
| 代理商： | TC1222ECHRT |
2
TC1221/1222-2 5/4/00
TC1221
TC1222
High Frequency Switched Capacitor
Voltage Converters with Shutdown
in SOT Packages
2001 Microchip Technology Inc.
DS21367A
ABSOLUTE MAXIMUM RATINGS*
Input Voltage (VIN to GND) ......................... +6.0V, – 0.3V
Output Voltage (OUT to GND) .................... –6.0V, + 0.3V
Current at OUT Pin ................................................. 50 mA
Short-Circuit Duration – OUT to GND ................ Indefinite
Operating Temperature Range ............... – 40
°C to +85°C
Power Dissipation (TA ≤ 70°C)
6-Pin SOT-23A .............................................. 240 mW
Storage Temperature (Unbiased) ......... – 65
°C to +150°C
Lead Temperature (Soldering, 10 sec) ................. +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: TA = –40°C to +85°C, VIN = +5V, C1 = C2 = 1F (TC1221), C1 = C2 = 0.22F
(TC1222), unless otherwise noted. Typical values are at TA = +25°C.
Symbol Parameter
Device
Test Conditions
Min
Typ
Max
Unit
IDD
Supply Current
TC1221
—
290
600
A
TC1222
—
1800
2800
ISHDN
Shutdown Supply Current
SHDN = GND,
—
0.01
1.0
A
VIN = 5V (Note 2)
VMIN
Minimum Supply Voltage
RLOAD = 1 K:
1.8
—
V
VMAX
Maximum Supply Voltage
RLOAD = 1 K
—
5.5
V
FOSC
Oscillator Frequency
TC1221
81
125
169
KHz
TC1222
550
750
950
VIH
Shutdown Input
VIN = VMIN to VMAX
1.4
—
V
Logic High
VIL
Shutdown Input Logic Low
VIN = VMIN to VMAX
—
0.4
V
PEFF
Power Efficiency
TC1221
RLOAD = 1 K
—90
—
%
TC1222
70
VEFF
Voltage Conversion
RLOAD = ∞
94
96
—
%
Efficiency
ROUT
Output Resistance
TC1221
ILOAD = 0.5mA to 25mA
—
25
65
(Note 1)
TC1222
TWK
Wake-Up Time From
TC1221
RLOAD = 1K
—80
—
sec
Shutdown Mode
TC1222
—
25
—
NOTES: 1. Capacitor contribution is approximately 20% of the output impedance [ESR = 1 / pump frequency x capacitance)].
2. VIN is guaranteed to be disconnected from OUT when the converter is in shutdown.
PIN DESCRIPTION
Pin No.
(6-Pin SOT-23A)
Symbol
Description
1
OUT
Inverting Charge Pump Output.
2VIN
Positive Power Supply Input.
3C
–
Commutation Capacitor Negative Terminal.
4
GND
Ground.
5
SHDN
Shutdown Input (Active Low).
6C
+
Commutation Capacitor Positive Terminal.
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