MAX853ESA Datasheet Download

Part No.:
MAX853ESA
Download:
Download Datasheet
Description:
[Low-Noise, Regulated, Negative Charge-Pump Power Supplies for GaAsFET Bias]
File Size:
120 K
Page:
8 Pages
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Manufacturer:
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
PCB Prototype
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19-0238; Rev 2; 4/96
Low-Noise, Regulated, Negative
Charge-Pump Power Supplies for GaAsFET Bias
_______________General Description
The MAX850–MAX853 low-noise, inverting, charge-
pump power supplies are ideal for biasing GaAsFETs in
cellular telephone transmitter amplifiers.
The MAX850–MAX852 offer both preset (-4.1V) and
adjustable (-0.5V to -9.0V) output voltages. The
MAX853 uses an external positive control voltage to set
the negative output voltage. Input voltage range for all
four devices is 4.5V to 10V. Output current is 5mA.
An internal linear regulator reduces the output voltage
ripple to 2mVp-p. With a well-filtered control voltage
(V
CTRL
), the MAX853 achieves typical output ripple of
less than 1mVp-p. Supply current is 3mA max, and
shutdown current is less than 1µA max over temperature
(5µA max for MAX851).
NUAL
KIT MA
UATION TA SHEET
EVAL
WS DA
FOLLO
____________________________Features
o
Fixed -4.1V or Adjustable -0.5V to -9V Output at 5mA
o
4.5V to 10V Input Voltage Range
o
2mVp-p Output Voltage Ripple (MAX850–MAX852)
1mVp-p Output Voltage Ripple (MAX853)
o
100kHz Charge-Pump Switching Frequency
(MAX850/MAX851/MAX853)
o
External Synchronizing Clock Input (MAX852)
o
Logic-Level Shutdown Mode: 1µA Max Over
Temperature (MAX850/MAX852/MAX853)
o
Low Cost, 8-Pin SO Package
MAX850–MAX853
______________Ordering Information
________________________Applications
Cellular Phones
Negative Regulated Power Supplies
Personal Communicators, PDAs
Wireless Data Loggers
Continuously Adjustable GaAsFET Bias
LCD-Bias Contrast Control
PART
MAX850C/D
MAX850ISA
MAX850ESA
MAX851C/D
MAX851ISA
MAX851ESA
MAX852C/D
TEMP. RANGE
0°C to +70°C
-25°C to +85°C
-40°C to +850°C
0°C to +70°C
-25°C to +85°C
-40°C to +85°C
0°C to +70°C
PIN-PACKAGE
Dice*
8 SO
8 SO
Dice*
8 SO
8 SO
Dice*
8 SO
8 SO
Dice*
8 SO
8 SO
__________Typical Operating Circuit
V
IN
= 4.5V to 10.0V
(4 CELLS)
MAX852ISA
-25°C to +85°C
MAX852ESA
-40°C to +85°C
MAX853C/D
0°C to +70°C
MAX853ISA
-25°C to +85°C
MAX853ESA
-40°C to +85°C
* Dice are specified at T
A
= +25°C only.
ise*
C3
IN
C1+
C1
C1-
V
OUT
= -4.1V
(V
GG
of GaAsFET)
OUT
C4
__________________Pin Configuration
TOP VIEW
MAX850
MAX851
MAX852
NEGOUT
C2
SHDN*
SHDN
OSC
GND
* MAX850: SHDN
MAX851: SHDN
MAX852: OSC
C1+ 1
C1- 2
NEGOUT 3
8
IN
GND
OUT
FB**
(MAX850–852)
FB
SHDN* 4
(MAX850/853)
MAX850
MAX851
MAX852
MAX853
SO
7
6
5
* SHDN (MAX851)
OSC (MAX852)
** CONT (MAX853)
________________________________________________________________
Maxim Integrated Products
1
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