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參數資料
| 型號： | MAX8890EGCHGF |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Analog IC |
| 中文描述： | 模擬IC |
| 文件頁數： | 1/4頁 |
| 文件大小： | 57K |
| 代理商： | MAX8890EGCHGF |
General Desc ription
The MAX881R IC is an inverting, charge-pump DC-DC
converter with a low-noise, regulated output. Low out-
put ripple voltage makes this device ideal for biasing
the GaAsFETs commonly found in cellular telephone
transmitters.
The MAX881R evaluation kit (EV kit) is a fully assem-
bled and tested surface-mount board. Provisions are
made for mounting a second voltage-divider resistor,
which is required for setting output voltages other than
-2V. A special scope-probe socket is also mounted on
the board, so output noise can be observed on an
oscilloscope.
Features
o
1mVp-p Output Voltage Ripple
o
2.5V to 5.5V Input Range
o
Uses One 4.7μF and Three 1μF Ceramic
Capacitors
o
-2V Regulated Output (or Adjustable)
o
4mA Output Current
o
Power OK (
POK
) Output
o
Fully Assembled and Tested Surface-Mount
Board
Quic k S tart
The MAX881R EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Do not turn on the power supply until all connec-
tions are completed.
1) Connect a 2.5V to 5.5V supply to the pad labeled
VIN. Connect the ground lead to the pad labeled
GND.
2) Connect a voltmeter and the load to the VOUT pad.
3) Make sure there is no shunt across J U1.
4) Turn on the power and verify that the output is -2V.
You can insert a scope probe into J 1 to observe the
output noise. Be sure the scope ground makes con-
tact with the outside of the connector.
E
MAX 881R Evaluation K it
________________________________________________________________ Maxim Integrated Products
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
1
19-1372; Rev 1; 6/98
QTY
DESCRIPTION
C1, C2, C3
3
C4
1
J 1
1
Scope-probe connector
Berg Electronics 33J R135-1
2-pin jumper
J U1
R1
R2
R3, R4
U1
None
None
1
0
1
2
1
1
1
Not installed
100k
, 1% resistor
1M
resistors
MAX881RREUB
Shunt
Printed circuit board
4.7μF, 10V, low-ESR ceramic capacitor
Taiyo Yuden LMK316BJ 475ML
1μF, 16V, low-ESR ceramic capacitors
Taiyo Yuden EMK316BJ 105KL
SUPPLIER
PHONE
FAX
Berg Electronics
Sprague
Taiyo Yuden
(317) 738-2800
(603) 224-1961
(408) 573-4150
(317) 738-2858
(603) 224-1430
(408) 573-4159
DESIGNATION
Component List
PART
MAX881REVKIT
-40°C to +85°C
TEMP. RANGE
IC PACKAGE
10 μMAX
Ordering Information
Component S uppliers
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