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参数资料
| 型号： | MAX8594ETG+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/22页 |
| 文件大小： | 0K |
| 描述： | IC PMIC W/DC-DC SUP 24-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 应用： | 手持/移动设备 |
| 电源电压： | 3.1 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 管件 |
5-Output PMICs with DC-DC Core Supply for
Low-Cost PDAs
Pin Description
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
NAME
SDIG
IN
RS
LBO
DBO
DBI
LBI
CV
ENM
GND
REF
LFB
ENL
LXL
FUNCTION
3.3V, 500mA LDO Output for Secure-Digital Card Slot. SDIG has reverse current protection so SDIG
can be biased when no power is present at IN. SDIG output turns off when V IN is below the DBI
threshold, ENSD goes low, or MAIN is out of regulation. When SDIG turns off, the output is discharged
at a rate depending on the load and the internal feedback resistors (typically 1.3M ? ).
Input Voltage to the MAX8594/MAX8594A. Bypass IN to GND with a 1μF ceramic capacitor.
Reset Output. RS is an active-low, open-drain output that goes high impedance 20ms (typ) after
COR1 is in regulation. COR1 does not turn on until MAIN is in regulation. If MAIN falls out of
regulation, COR1 turns off and RS goes low. If MAIN is still in regulation, then RS goes low when V IN
is below the DBI threshold. RS goes low when ENC1 is low.
Low-Battery Detector Open-Drain Output. LBO is an active-low, open-drain output that goes high
impedance when V IN is greater than both the DBI and LBI thresholds. LBO goes low when V IN falls
below the LBI threshold.
Dead-Battery Detector Open-Drain Output. When V IN is below the DBI threshold, both DBO and LBO
go low, all outputs shut down, and the MAX8594/MAX8594A enter the lowest possible quiescent-
current state. Once this occurs, MAIN does not turn back on until both V IN exceeds the DBI threshold
and ENM = high. DBO is an active-low, open-drain output that goes high impedance when V IN
exceeds the DBI threshold.
Dead-Battery Detector. DBI remains active at all times. If DBI = IN, the DBI threshold is 3.0V when IN
is falling and 3.3V when rising. The DBI threshold can also be adjusted to other values by connecting
DBI to a resistor voltage-divider. Also see the DBO description.
Low-Battery Detector. If LBI = IN, the LBI threshold is 3.33V when IN is falling and 3.7V when rising.
The LBI threshold can also be adjusted to other values by connecting LBI to a resistor voltage-
divider. Also see the LBO description.
Selects 1V or 1.3V COR1 Output Voltage for MAX8594, and 1.3V or 1.8V COR1 for MAX8594A. Drive CV
high or connect to IN for a 1.3V COR1 output (1.8V COR1 for MAX8594A). Drive CV low or connect to GND
for a 1V COR1 output (1.3V COR1 for MAX8594A).
Enable Input for MAIN. No other outputs turn on until MAIN is in regulation. If MAIN is pulled out of
regulation, all other outputs turn off and RS goes low. MAIN cannot be activated when V IN is below
the DBI threshold.
Ground
1.25V 1% Reference. Bypass REF with a 0.1μF capacitor to GND. REF is enabled when V IN is greater
than the DBI threshold. REF is off when V IN is below the DBI threshold.
LCD Feedback Input. Connect LFB to a resistor-divider network between the LCD output and GND.
The feedback threshold is 1.25V. LCD turns off when V IN is below the DBI threshold, when ENL goes
low, or when MAIN is out of regulation. When off, the LCD output is discharged at a rate depending
on the load and the external feedback resistors (typically 2.4M ? ).
Enable Input for LCD (Boost Regulator). Drive ENL high to activate the LCD boost. Drive ENL low to
shut down the LCD output. The LCD converter cannot be activated when V IN is below the DBI
threshold or before MAIN is in regulation.
LCD Boost Switch. Connect LXL to a boost inductor and Schottky diode. See Figure 1.
12
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| MAX8594ETG+ | 功能描述:PMIC 解决方案 5-Output PMIC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
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| MAX8594ETG-T | 功能描述:PMIC 解决方案 5-Output PMIC RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
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