參數(shù)資料
型號： MAX8890
廠商： Maxim Integrated Products, Inc.
英文描述： Integrated Cellular RF-Section Power-Management IC
中文描述： 集成的蜂窩電話RF部分電源管理IC
文件頁數(shù)： 6/12頁
文件大?。?/td> 233K
代理商： MAX8890
M
Integrated Cellular RF-S ec tion
Power-Management IC
6
_______________________________________________________________________________________
Typic al Operating Charac teristic s (c ontinued)
(Circuit of Figure 1, MAX8890ETCGGG, V
IN
= 3.3V, EN_ = IN_, T
A
= +25
°
C, unless otherwise noted.)
ENABLE WAVEFORM
(1ST OUTPUT)
MAX8890 toc16
20
μ
s/div
A
C
D
B
A. V
EN1
= 0 to 3.3V, 5V/div
B. V
OUT1
= 2.8V, R
= 28
(100mA), 2V/div
C. V
BP
= 1.25V, 1V/div
D. I
IN
, 200mA/div
V
IN
= 3.3V, EN2 = EN3 = GND, C
BP
= 0.01
μ
F
20
μ
s/div
ENABLE WAVEFORM
(2ND OUTPUT)
A
C
D
B
MAX8890 toc17
A. V
EN2
= 0 to 3.3V, 5V/div
B. V
OUT2
= 2.8V, R
OUT2
= 28
(100mA), 2V/div
C. V
BP
= 1.25V, 1V/div
D. I
, 200mA/div
V
IN
= 3.3V, EN1 = IN, EN3 = GND, C
BP
= 0.01
μ
F
Pin Desc ription
PIN
NAME
FUNCTION
1
IN1
Regulator 1 Input. Supply voltage can range from 2.5V to 5.5V. Bypass with a capacitor to GND (see
Capacitor Selection and Regulator Stability
section).
2
IN2
Regulator 2 Input. Supply voltage can range from 2.5V to V
IN1
. Bypass with a capacitor to GND (see
Capacitor Selection and Regulator Stability
section).
3
OUT2
Regulator 2 Output. Sources up to 100mA. Bypass with a 2.2μF ceramic capacitor to GND.
4
EN1
Active-High Enable Input for Regulator 1. A logic low shuts down the first linear regulator. In shutdown,
OUT1 is pulled low through an internal 5k
resistor. Connect to IN1 for normal operation.
5
EN2
Active-High Enable Input for Regulator 2. A logic low shuts down the second linear regulator. In
shutdown, OUT2 is pulled low through an internal 5k
resistor. Connect to IN2 for normal operation.
6
EN3
Active-High Enable Input for Regulator 3. A logic low shuts down the third linear regulator. In
shutdown, OUT3 is pulled low through an internal 5k
resistor. Connect to IN3 for normal operation.
7
BP
1.25V Voltage Reference Bypass Pin. Connect a 0.01μF ceramic bypass capacitor from BP to GND to
minimize the output noise. Make no other connection to this pin.
8
GND
Ground. Connect both ground pins together externally, as close to the IC as possible.
9
IN3
Regulator 3 Input. Supply voltage can range from 2.5V to V
IN1
. Bypass with a capacitor to GND (see
Capacitor Selection and Regulator Stability
section).
10
11
12
OUT3
GND
OUT1
Regulator 3 Output. Sources up to 100mA. Bypass with a 2.2μF ceramic capacitor to GND.
Ground. Connect both ground pins together externally, as close to the IC as possible.
Regulator 1 Output. Sources up to 100mA. Bypass with a 2.2μF ceramic capacitor to GND.
EP
GND
Gr ound
T H E EXPO SED PA D A N D A L L F O U R C O R N ER T A B S O N T H E Q F N PA C K A G E A R E
IN T ER N A L L Y C O N N EC T ED TO G R O U N D
The exp osed p ad functi ons as a heatsi nk. S ol d er to a l ar g e
p ad or to the ci cui b oar d g r ound p ane to m axi m ze p ow er d ssi p ati on. D o not use as d evi ce g r ound
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