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參數資料
| 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： | 1/12頁 |
| 文件大?。?/td> | 233K |
| 代理商： | MAX8890 |
General Desc ription
The MAX8890 is a power-management IC intended for
cellular handsets using a single lithium-ion (Li+) cell
battery with input voltages from +2.5V to +5.5V. The IC
contains three identical, low-noise, low-dropout (LDO)
linear regulators to provide all of the supply voltage
requirements for the RF portion of the handset.
The first LDO is intended to power the transmitter,
receiver, and synthesizer. The second LDO is intended
to power the TCXO, and high-power voltage-controlled
oscillators (VCOs). The third LDO is intended to power
the UHF offset VCO.
Each LDO has its own individual enable (ON/
OFF
) con-
trol to maximize design flexibility. The reference is pow-
ered on if any of the enable inputs (EN1, EN2, EN3) are
logic high. The high-accuracy output voltage of each
LDO is preset at an internally trimmed voltage (1.8V to
3.3V in 50mV increments). Each LDO is capable of sup-
plying 100mA with a low 50mV dropout and is opti-
mized for low noise and high crosstalk-isolation.
Designed with internal P-channel MOSFET pass transis-
tors, the MAX8890’s low 180μA operating supply cur-
rent is independent of load.
Other features include short-circuit and thermal-over-
load protection. The MAX8890 is available in a com-
pact, high-power, 12-pin 4mm
4mm QFN package
with a metal pad on the underside.
Applic ations
Cellular Handsets
Single-Cell Li+ Systems
3-Cell NiMH, NiCD, or Alkaline Systems
Personal Digital Assistants (PDAs)
Features
o
Three 100mA Low-Dropout Linear Regulators
o
Low 50mV Dropout Voltage at 100mA
o
±1% Output Voltage Accuracy Over Temperature
o
Preset 1.8V to 3.3V Output Voltages
(in 50mV Increments)
o
Low 45μV
RMS
Output Voltage Noise
o
Low 180μA Operating Supply Current
o
2.5V to 5.5V Input Voltage Range
o
67dB PSRR
o
10μV
P-P
Channel-to-Channel Crosstalk
o
Short-Circuit Protection
o
Thermal-Overload Protection
o
0.01μA Shutdown Current
o
Tiny 12-Pin 4mm x 4mm QFN Package
M
Integrated Cellular RF-S ec tion
Power-Management IC
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1
Ordering Information
19-2075; Rev 2; 10/02
Standard Versions table and Pin Configuration appear at
end of data sheet.
PART
TEMP RANGE
PIN PACKAGE
12 (4mm x 4mm) QFN
MAX8890ETCxyz* -40
°
C to +85
°
C
*
Each preset output voltage of these devices is factory
trimmed to one of ten voltages. Replace “xyz” with the letters
corresponding to the desired output voltages (see Standard
Preset Output Voltage Suffixes table), where the three letter
suffix corresponds to the following output voltages: “x” =
V
OUT1
, “y” = V
OUT2
, and “z” = V
OUT3
.
Note:
There are five standard versions available (see Standard
Versions table). Sample stock is generally held on standard
versions only. Standard versions have an order increment
requirement of 2500 pieces. Nonstandard versions have an
order increment requirement of 10,000 pieces. Contact the
factory for availability of nonstandard versions.
Typic al Operating Circ uit
SUFFIX
OUTPUT
VOLTAGE (V)
SUFFIX
OUTPUT
VOLTAGE (V)
A
B
D
F
G
3.30
3.00
2.90
2.85
2.80
H
J
K
L
M
2.75
2.70
2.50
2.00
1.80
S tandard Preset Output
Voltage S uffixes
*
Nonstandard output voltages between 1.80V and 3.30V are
available in 50mV increments.
ON
OFF
IN1
OUT1
IN2
OUT2
IN3
OUT3
EN1
BP
EN2
EN3
GND
MAX8890
INPUT
OUTPUT #1
OUTPUT #2
OUTPUT #3
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相關代理商/技術參數 |
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|---|---|
| MAX8890EGCAAA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8890EGCABK | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8890EGCAKM | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8890EGCBBB | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX8890EGCBKK | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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