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參數(shù)資料
| 型號(hào)： | MAX851 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Quadruple 2-Input Positive-AND Gates 20-LCCC -55 to 125 |
| 中文描述： | 低噪聲、穩(wěn)壓型、負(fù)輸出電荷泵，用于GaAsFET偏置電源 |
| 文件頁(yè)數(shù)： | 8/8頁(yè) |
| 文件大小： | 118K |
| 代理商： | MAX851 |
M
Low-Noise, Regulated, Negative
Charge-Pump Power Supplies for GaAsFET Bias
8
______________________________________________________________________________________
___________________Chip Topography
________________________________________________________Pac kage Information
sensitivity and interference. The clock must be a square wave
between 40% and 60% duty cycle. The maximum clock fre-
quency is 250kHz, and the minimum frequency is 50kHz.
Layout and Grounding
Good layout is important, primarily for good noise perfor-
mance.
1) Mount all components as close together as possible.
2) Keep traces short to minimize parasitic inductance
and capacitance. This includes connections to FB.
3) Use a ground plane.
Noise and Ripple Measurement
Accurately measuring the output noise and ripple is a chal-
lenge. Brief differences in ground potential between the
MAX850–MAX853 circuit and the oscilloscope (which result
from the charge pump’s switching action) cause ground
currents in the probe’s wires, inducing sharp voltage spikes.
For best results, measure directly across the output capaci-
tor (C4). Do not use the ground lead of the oscilloscope
probe; instead, remove the probe’s tip cover and touch the
ground ring on the probe directly to C4’s ground terminal.
You can also use a Tektronix chassis mount test jack (part
no. 131-0258) to connect your scope probe directly. This
direct connection gives the most accurate noise and rip-
FB (MAX850–852)
CONT (MAX853)
OUT
GND
IN
NEGOUT
C1-
C1+
SHDN (MAX850/853)
SHDN (MAX851)
OSC (MAX852)
0.127"
(3.226mm)
0.085"
(2.159mm)
TRANSISTOR COUNT: 164
SUBSTRATE CONNECTED TO IN
L
D
A
A1
B
C
D
E
e
H
h
L
α
MIN
0.053
0.004
0.014
0.007
0.189
0.150
0.228
0.010
0.016
0
MAX
0.069
0.010
0.019
0.010
0.197
0.157
0.244
0.020
0.050
8
MIN
1.35
0.10
0.35
0.19
4.80
3.80
5.80
0.25
0.40
0
MAX
1.75
0.25
0.49
0.25
5.00
4.00
6.20
0.50
1.27
8
21-325A
INCHES
MILLIMETERS
α
8-PIN PLASTIC
SMALL-OUTLINE
PACKAGE
H
E
D
e
A
A1
C
h x 45
0.127mm
0.004in.
B
1.27 BSC
0.050 BSC
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX851ESA | Low-Noise, Regulated, Negative Charge-Pump Power Supplies for GaAsFET Bias |
| MAX851ISA | Low-Noise, Regulated, Negative Charge-Pump Power Supplies for GaAsFET Bias |
| MAX852ESA | Low-Noise, Regulated, Negative Charge-Pump Power Supplies for GaAsFET Bias |
| MAX852ISA | Low-Noise, Regulated, Negative Charge-Pump Power Supplies for GaAsFET Bias |
| MAX853ESA | Low-Noise, Regulated, Negative Charge-Pump Power Supplies for GaAsFET Bias |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX8510ETA18+T | 功能描述:低壓差穩(wěn)壓器 - LDO 120mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX8510ETA25+ | 制造商:Maxim Integrated Products 功能描述:ULTRA-LOW-NOISE HIGH PSRR LOW-DROPOUT 120MA LINEAR REGULATOR - Rail/Tube 制造商:Rochester Electronics LLC 功能描述: |
| MAX8510ETA25+T | 功能描述:低壓差穩(wěn)壓器 - LDO 120mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX8510ETA28+T | 功能描述:低壓差穩(wěn)壓器 - LDO 120mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
| MAX8510ETA29+T | 功能描述:低壓差穩(wěn)壓器 - LDO 120mA Linear Regulator RoHS:否 制造商:Texas Instruments 最大輸入電壓:36 V 輸出電壓:1.4 V to 20.5 V 回動(dòng)電壓（最大值）:307 mV 輸出電流:1 A 負(fù)載調(diào)節(jié):0.3 % 輸出端數(shù)量: 輸出類型:Fixed 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-20 |
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