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参数资料
| 型号： | MAX5040EUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 12/21页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR VOLT TRACK 10-UMAX |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 应用： | 处理器 |
| 电流 - 电源： | 1.3mA |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-µMAX |
| 包装： | 带卷 (TR) |
Voltage-Tracking Controllers for
PowerPC, DSPs, and ASICs
V IN (5V)
IN
I/O
POWER
OUT
V I/O = 3.3V AT 2.0A
I/O
SUPPLY
SHDN
R5
13.3k ?
1%
Q1
Si9428
SO-8
C I/O
100 μ F
PowerPC/
DSP/ASIC
CORE
V CORE = 1.8V AT 2.0A
IN
POWER OUT
SUPPLY
SHDN
R6
10k ?
1%
C CORE
100 μ F
R1
10k ?
0.1%
R9
1k ?
5%
R4
50 ?
CORE
GPIO
SDO
CORE
I/O
C2
C3
22nF
I/O_SENSE
1.5nF
C IN
1 μ F
R7
25.5k ?
1%
V CC
MAX5040
NDRV
C1
100nF
R3
10k ?
R2A
9.09k ?
0.1%
R8
UVLO
CORE_FB
R2B
158 ?
10k ?
1%
GND
POK
1%
Figure 10. Typical Application Circuit for the MAX5040
UVLO
UVLO is a user-programmable undervoltage lockout
input. When the UVLO voltage is above V UVCC , the
MAX5039/MAX5040 hold SDO high, given that V CC is
within its operating range and there is no fault condition
present. When the UVLO voltage falls below V UVCC ,
SDO is pulled low. Use a resistor-divider from the input
of the CORE and I/O power supplies to UVLO to GND
to set the undervoltage lockout (see the Typical
Application Circuit ). The MAX5039/MAX5040 keep the
CORE and I/O power supplies off (through the SDO )
until their input voltage is within its operating range.
UVLO can be used to turn off the CORE and I/O power
supplies through SDO . Pull the UVLO pin low with an
open-collector driver to assert SDO , which turns off the
power supplies.
Active Bleeder
The MAX5039/MAX5040 contain an internal 20 ? N-
channel MOSFET bleeder that connects CORE to
ground. The bleeder turns on whenever the MAX5039/
MAX5040 hold SDO low and V CC is above the V CC IC
turn-on voltage threshold (2.43V). This bleeder assists
in discharging the output capacitor(s) during power-
down/brownout conditions. The MAX5039/MAX5040
maintain tight voltage tracking of the CORE and I/O
voltages, as long as V CC is within its operating voltage
range. It is important to discharge the output capacitors
to ground before V CC drops out of its range. Figure 11
illustrates a method to prolong V CC after a power-
down/brownout condition.
The hold-up capacitor, C HD , holds the voltage at V CC
up and provides the power to the MAX5039/MAX5040
to keep them in operation even after V IN has gone
down.
Power-Up
The MAX5039/MAX5040 prevent premature turning on
of the CORE and I/O power supplies during power-up
by actively holding SDO low as soon as V CC rises
above 0.9V, provided the condition for SDO to stay low
is valid. The MAX5039/MAX5040 completely turn on
and NDRV is operational when V CC rises above the
V CC IC turn-on voltage threshold (2.43V). In this state,
the MAX5039/MAX5040 maintain tight tracking of the
CORE and I/O output voltages. The MAX5039/
MAX5040 continue to hold SDO low until the UVLO volt-
age rises above V UVCC (1.230V).
Once the UVLO voltage rises above V UVCC , SDO goes
high, enabling the CORE and I/O power supplies at the
same time. Without voltage tracking, depending on the
12
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX5040EVKIT | 制造商:Maxim Integrated Products 功能描述:VOLTAGE-TRACKING CONTROLLER FOR POWERPC, DSPS - Bulk |
| MAX5041 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Dual-Phase.Parallelable.Average Current-Mode Controllers |
| MAX-504-1205 | 制造商:SLPOWER 制造商全称:SL Power Electronics 功能描述:400, 500 WATTS MULTIPLE OUTPUT |
| MAX-504-1205AP | 功能描述:PWR SPY QD OP +5VLT +-12VLT +5.2 RoHS:否 类别:电源 - 外部/内部（非板载） >> AC DC 转换器 系列:MAX-500 产品培训模块:MP Modular-Configurable AC-DC Power Supply 特色产品:Configurable Power Supplies 标准包装:1 系列:MP |
| MAX-504-1205F | 制造商:SL Power Electronics 功能描述:Power Supply-Multiple Output |
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