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參數(shù)資料
| 型號(hào)： | MAX853ISA |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類(lèi)： | 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(yè)數(shù)： | 8/8頁(yè) |
| 文件大?。?/td> | 118K |
| 代理商： | MAX853ISA |
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
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX853ISA+ | 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 |
| MAX853ISA+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 |
| MAX853ISA-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 |
| MAX8540EEE | 功能描述:電流型 PWM 控制器 RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX8540EEE+ | 功能描述:電流型 PWM 控制器 Synchronizable PWM Controller RoHS:否 制造商:Texas Instruments 開(kāi)關(guān)頻率:27 KHz 上升時(shí)間: 下降時(shí)間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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