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參數(shù)資料
| 型號： | MAX1719 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | Replaced by TMS320VC5506 : Digital Signal Processors 132-BQFP 0 to 0 |
| 中文描述： | SOT23封裝、開關(guān)電容電壓反相器，帶有關(guān)斷 |
| 文件頁數(shù)： | 5/8頁 |
| 文件大小： | 568K |
| 代理商： | MAX1719 |
Detailed Description
The MAX1719/MAX1720/MAX1721 capacitive charge
pumps invert the voltage applied to their input. For high-
est performance, use low equivalent series resistance
(ESR) capacitors (e.g., ceramic).
During the first half-cycle, switches S2 and S4 open,
switches S1 and S3 close, and capacitor C1 charges to
the voltage at IN (Figure 2). During the second half-
cycle, S1 and S3 open, S2 and S4 close, and C1 is level
shifted downward by V
IN
volts. This connects C1 in par-
allel with the reservoir capacitor C2. If the voltage across
C2 is smaller than the voltage across C1, charge flows
from C1 to C2 until the voltage across C2 reaches
-V
IN
. The actual voltage at the output is more positive
than -V
IN
, since switches S1–S4 have resistance and the
load drains charge from C2.
M
SOT23, Switched-Capacitor
Voltage Inverters with Shutdown
_______________________________________________________________________________________
5
Typical Operating Characteristics (continued)
(Circuit of Figure 1, V
IN
= +5V, SHDN = GND (MAX1719),
SHDN
= IN (MAX1720/MAX1721), C1 = C2 = C3, T
A
= +25°C, unless
otherwise noted.)
0
100
50
150
300
350
250
200
400
0
1.0 1.5 2.0 2.5
CAPACITANCE (
μ
F)
0.5
3.0 3.5 4.0 4.5 5.0
MAX1719/MAX1721
OUTPUT VOLTAGE RIPPLE vs. CAPACITANCE
M
O
V
IN
= +4.75V, V
OUT
= -4.0V
V
IN
= +3.15V, V
OUT
= -2.5V
V
IN
= +1.9V, V
OUT
= -1.5V
50
μ
s/div
MAX1721
START-UP FROM SHUTDOWN
R
L
= 1k
V
OUT
2V/div
V
5V/div
Noninverting Shutdown Input. Drive this pin low for normal operation; drive it high for
shutdown mode.
OUT is actively pulled to ground during shutdown.
SHDN
5
Ground
GND
4
Negative Terminal of Flying Capacitor
C1-
3
Power-Supply Positive Voltage Input
IN
2
Inverting Charge-Pump Output
OUT
1
FUNCTION
NAME
0
10
5
20
15
30
25
35
MAX1719/MAX1721
OUTPUT CURRENT vs. CAPACITANCE
M
CAPACITANCE (
μ
F)
O
V
IN
= +1.9V, V
OUT
= -1.5V
V
IN
= +4.75V, V
OUT
= -4.0V
V
IN
= +3.15V, V
OUT
= -2.5V
0
1.0 1.5 2.0 2.5
0.5
3.0 3.5 4.0 4.5 5.0
Positive Terminal of Flying Capacitor
C1+
6
Pin Description
Inverting Shutdown Input. Drive this pin high for normal operation; drive it low for
shutdown mode.
OUT is actively pulled to ground during shutdown.
SHDN
–
5
6
–
4
3
2
1
MAX1720
MAX1721
MAX1719
PIN
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX1719EUT | Replaced by TMS320VC5506 : Digital Signal Processors 100-LQFP 0 to 0 |
| MAX1721EUT | Replaced by TMS320VC5506 : Digital Signal Processors 132-BQFP 0 to 0 |
| MAX1720EUT | SOT23, Switched-Capacitor Voltage Inverters with Shutdown |
| MAX1726 | Replaced by TMS320VC5506 : |
| MAX1725EUK-T | 12V, Ultra-Low IQ, Low-Dropout Linear Regulators |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX1719EUT | 制造商:Maxim Integrated Products 功能描述:NEW PRODS STKG, FOR PROTOS - Rail/Tube |
| MAX1719EUT+ | 制造商:Maxim Integrated Products 功能描述:CHG PUMP INV -5.5V TO -1.4V 25MA 6PIN SOT-23 - Rail/Tube |
| MAX1719EUT+T | 功能描述:電荷泵 Switched-Cap Voltage Inverter w/Shutdown RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| MAX1719EUT-T | 功能描述:電荷泵 Switched-Cap Voltage Inverter w/Shutdown RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| MAX1720EUT | 功能描述:電荷泵 Switched Cap Voltage RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
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