參數(shù)資料
型號： MAX8893BEWV+
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 微控制器/微處理器
英文描述： SPECIALTY MICROPROCESSOR CIRCUIT, PBGA30
封裝： 3 X 2.50 MM, 0.64 MM HEIGHT, ROHS COMPLIANT, WLP-30
文件頁數(shù)： 22/51頁
文件大小： 4976K
代理商： MAX8893BEWV+
PMICs for Multimedia Application Processors
in a 3.0mm x 2.5mm WLP
MAX8893A/MAX8893B/MAX8893C
______________________________________________________________________________________ 29
Low-Dropout Linear Regulators
The MAX8893A/MAX8893B/MAX8893C contain five low-
dropout, low-quiescent-current, high-accuracy, linear
regulators (LDOs). The LDO output voltages are set
through the I2C serial interface. The LDOs include
an internal reference, error amplifier, p-channel pass
transistor, and internal programmable voltage-divider.
Each error amplifier compares the reference voltage to
a feedback voltage and amplifies the difference. If the
feedback voltage is lower than the reference voltage,
the pass-transistor gate is pulled lower, allowing more
current to pass to the output and increasing the output
voltage. If the feedback voltage is too high, the pass-
transistor gate is pulled up, allowing less current to pass
to the output.
Default Regulator Output Voltages
The default regulator output voltages are set as shown
in Table 1. All regulator output voltages (BUCK, LDO1,
LDO2, LDO3, LDO4, and LDO5) are programmable
through the I2C serial interface.
Enable Inputs (ENBUCK, ENLDO_,
ENLS, ENUSB)
The MAX8893A/MAX8893B/MAX8893C have individ-
ual enable inputs for each regulator, load switch, and
USB switch. The individual enable inputs (ENBUCK,
ENLDO1, ENLDO2, ENLDO3, ENLDO45, ENLS) are
logically ORed with the corresponding I2C serial inter-
face control bit. ENUSB input is logically NANDed with
the EUSB bit. See Tables 2, 3, and 4 for enable logic
truth tables. The enable inputs (ENBUCK, ENLDO_, and
ENLS) are internally pulled to AGND by an 800kI (typ)
pulldown resistor. ENUSB is internally pulled up to BATT
by an 800kω (typ) pullup resistor.
Any valid enable input signal turns on the MAX8893A/
MAX8893B/MAX8893C. After the IC is up, the I2C inter-
face is active and the IC can be reprogrammed through
the I2C interface. To turn off the IC, both I2C bus and
enable inputs must be low.
All I2C register values return to the default value when no
enable input signals are present.
Table 1. Default Regulator Output Voltages
Table 2. Truth Table for BUCK, LDO1 to LDO3, and Load Switch
Table 3. Truth Table for LDO4 and LDO5
PART
BUCK (V)
LDO1 (V)
LDO2 (V)
LDO3 (V)
LDO4 (V)
LDO5 (V)
MAX8893A
1.0
2.8
2.6
3.3
3.0
1.0
MAX8893B
1.0
2.6
3.3
2.8
MAX8893C
1.0
1.8
2.6
3.3
3.0
ENABLE INPUT (ENBUCK, ENLDO1,
ENLDO2, ENLDO3, OR ENLS)
CORRESPONDING I2C ON/OFF
CONTROL BIT
CORRESPONDING REGULATOR OR
SWITCH
0
Off
0
1
On
1
0
On
1
On
ENABLE INPUT
(ENLDO45)
ELDO4 BIT
ELDO5 BIT
LDO4
LDO5
0
Off
0
1
Off
On
0
1
0
On
Off
0
1
On
1
0
On
1
On
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX8893BEWV+T 制造商:Maxim Integrated Products 功能描述:UPMIC FOR APPLICATION PROCESSOR - Tape and Reel
MAX8893CEWV+ 制造商:Maxim Integrated Products 功能描述:UPMIC FOR APPLICATION PROCESSOR - Rail/Tube
MAX8893CEWV+T 制造商:Maxim Integrated Products 功能描述:UPMIC FOR APPLICATION PROCESSOR - Tape and Reel
MAX8895EVKIT+ 功能描述:電池管理 EVKIT for MAX8895 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel
MAX8895VEWA+ 制造商:Maxim Integrated Products 功能描述:LI-ION CHARGERS WITH SMART POWER SELECTOR, ADAPTER TYPE DETE - Rail/Tube
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