For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
Low-Noise, Regulated, Negative
Charge-Pump Power Supplies for GaAsFET Bias
MAX850–MAX853
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
IN
to GND ..................................-0.3V to 10.5V
V
NEGOUT
to GND ...................................................-10.5V to 0.3V
V
IN to
V
NEGOUT
.........................................................-0.3V to 21V
V
OUT
to GND (Note 1) ........................................V
NEGOUT
to 0.3V
SHDN or OSC (pin 4) Voltage to GND.........-0.3V to (V
IN
+ 0.3V)
Continuous Power Dissipation (T
A
= +70°C)
SO (derate 5.88mW/°C above +70°C) ........................471mW
Operating Temperature Ranges
MAX85_ISA ......................................................-25°C to +85°C
MAX85_ESA.....................................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
Note 1:
The output may be shorted to NEGOUT or GND if the package power dissipation is not exceeded. Typical short-circuit
current to GND is 50mA.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond 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
(+5V
≤
V
IN
≤
+10V, GND = 0V, V
OUT
= -4.1V, R
L
=
∞,
T
A
= T
MIN
to T
MAX
, unless otherwise noted. A 100kHz, 50% duty cycle square
wave between GND and V
IN
is applied to OSC on the MAX852.)
PARAMETER
Supply Voltage Range (Note 2)
SYMBOL
V
IN
MAX850–MAX852, V
FB
= 0V,
R
L
=
∞
or 820Ω, Figure 2a
MAX853, V
CTRL
= 4.1V,
R
L
=
∞
or 820Ω, Figure 2c
CONDITIONS
MIN
5
-4.3
-4.2
-0.5 to -(V
IN
- 1)
V
FBset
I
Q
MAX850/MAX853, V
IN
= 10V, SHDN = 0V
Shutdown Supply Current
I
SHUT
MAX851, SHDN = 2V
MAX852, OSC low
MAX850–MAX852, V
FB
= 0V,
R
L
=
∞
or 820Ω, Figure 2a
V
OUT
Load Regulation
MAX853, V
CTRL
= 4.1V,
R
L
=
∞
or 820Ω, Figure 2c
V
OUT
Ripple
Oscillator Frequency (Note 3)
Input High Voltage
Input Low Voltage
Input Current
Input Capacitance
f
OSC
V
IH
V
IL
I
IN
C
IN
MAX850–MAX852
MAX853
MAX850/MAX851/MAX853, T
A
= +25°C
Pin 4
Pin 4
Pin 4
Pin 4
10
80
2.0
0.5
±1
3
2
1
100
120
8
4
MAX850–MAX852, no load, Figure 2b
-1.32
-1.28
2.0
0.002
2
-1.24
3.0
1
5
1
8
mV/mA
µA
-4.1
TYP
MAX
10
-3.9
V
-4.0
V
V
mA
UNITS
V
Output Voltage
V
OUT
Output Voltage Range
Set Voltage
Supply Current
mVp-p
kHz
V
V
µA
pF
Note 2:
The supply voltage can drop to 4.5V, but the output may no longer sink 5mA at -4.1V.
Note 3:
The MAX852 will operate with a 50kHz to 250kHz square wave of 40% to 60% duty cycle. For best performance, use an
Sensorless Control of Induction Machines at Lowand Zero Speed by Using PWM Harmonicsfor Rotor-Bar Slotting DetectionReiko Raute, Member, IEEE, Cedric Caruana, Member, IEEE, Cyril S ......
语音作为自然的人机接口，可以使车载导航系统实现更安全、更人性化的操作。通过国内外车载导航系统的功能对比可知，支持语音交互是车载导航系统的一个发展趋势。另外，市场信息服务公司J.D Power and Associates的调研数据也表明，56％的消费者更倾向于选择声控的导航系统。因此，开发车载语音导航系统是很有意义的。目前，国内已经具备开发车载语音导航系统的技术基础，特别是文语转换TTS技术...[详细]
便携式医疗设备的特殊性决定了它们应该是对用户友好的、必须工作在无菌环境下，并且空间占用小、耗能低。 同时，便携式医疗设备还需要足够的计算能力以便处理医疗数据，能够连接到无线或有线接口以便记录和发送数据。从设计人员的角度考虑，上述需求需要低功耗的单片机（MCU）和数字信号控制器（Digital Signal Controller，DSC）。 正是有了嵌入式处理器，设计人员才有可能设...[详细]
FPGA/CPLD
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
