參數(shù)資料
型號(hào)： MAX851ISA
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 穩(wěn)壓器
英文描述： Low-Noise, Regulated, Negative Charge-Pump Power Supplies for GaAsFET Bias
中文描述： SWITCHED CAPACITOR REGULATOR, 120 kHz SWITCHING FREQ-MAX, PDSO8
封裝： PLASTIC, SOP-8
文件頁數(shù)： 6/8頁
文件大?。?/td> 118K
代理商： MAX851ISA
M
Low-Noise, Regulated, Negative
Charge-Pump Power Supplies for GaAsFET Bias
6
______________________________________________________________________________________
______________________________________________________________Pin Desc ription
MAX850
MAX851
MAX852
-REF
PUMP
IN
N
C1+
C1-
NEGOUT
SHDN (MAX850)
SHDN (MAX851)
OSC (MAX852)
OUT
CONNECT TO
GND TOSET
V
OUT
= -4.1V
FB
GND
MAX853
PUMP
IN
N
C1+
C1-
NEGOUT
SHDN
OUT
CONTROL
CONT
GND
_______________Detailed Desc ription
The MAX850–MAX853 are low-noise, inverting, regulat-
ed charge-pump power supplies designed for biasing
GaAsFET devices, such as power-amplifier modules in
cellular handsets.
The applied input voltage (V
IN
) is first inverted to a
negative voltage at NEGOUT by a capacitive charge
pump. This voltage is then regulated by an internal lin-
ear regulator, and appears at OUT (Figure 1). The mini-
mum (most negative) output voltage (V
OUT
) achievable
is the inverted positive voltage, plus the 1.0V required
by the post-regulator. The ripple noise induced by the
charge-pump inverter is reduced by the linear regulator
to 2mVp-p at V
OUT
for the MAX850–MAX852. In addi-
tion, the excellent AC rejection of the linear regulator
attenuates noise on the incoming supply. Up to 5mA is
available at OUT.
Figure 1a. MAX850–MAX852 Block Diagram
Figure 1b. MAX853 Block Diagram
MAX850
1
2
MAX851
1
2
MAX853
1
2
PIN
MAX852
1
2
NAME
C1+
C1-
FUNCTION
Positive terminal for C1
Negative terminal for C1
3
–
4
3
4
–
3
4
–
3
–
–
NEGOUT
SHDN
SHDN
Negative Output Voltage (unregulated), V
NEGOUT
= V
IN
+ 0.2V
Active-low TTL logic level Shutdown Input
Active-high TTL logic level Shutdown Input
–
–
–
4
OSC
External Clock Input
5
5
–
5
FB
Dual-Mode Feedback Input. When FB is grounded, the output is preset to
-4.1V. To select other output voltages, connect FB to an external resistor
divider. See Figure 2b.
–
5
–
–
CONT
Control Voltage Input. To set V
OUT
, connect a resistor divider between
OUT and a positive control voltage between 0V and 10V. See Figure 2c.
7
8
6
7
8
7
8
6
7
8
6
GND
IN
6
OUT
Ground
Positive Power-Supply Input (4.5V to 10V)
Output Voltage
相關(guān)PDF資料
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MAX852ESA Low-Noise, Regulated, Negative Charge-Pump Power Supplies for GaAsFET Bias
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX851ISA+ 功能描述:電荷泵 Regulated Negative Charge-Pump 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
MAX851ISA+T 功能描述:電荷泵 Regulated Negative Charge-Pump 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
MAX851ISA-T 功能描述:電荷泵 Regulated Negative Charge-Pump 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
MAX8520ETP 功能描述:其他電源管理 RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
MAX8520ETP/GG8 制造商:Maxim Integrated Products 功能描述:
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