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| 型号： | MAX5039EUA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 8/21页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR VOLT TRACK 8-MSOP |
| 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： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 带卷 (TR) |
Voltage-Tracking Controllers for
PowerPC, DSPs, and ASICs
SYSTEM POWER-UP/POWER-DOWN
SYSTEM POWER-UP/POWER-DOWN
(V I/O RISING BEFORE V CORE )
WITHOUT MAX5039/MAX5040
(V I/O RISING BEFORE V CORE )
V CC
NDRV
V CC
5V/div
NDRV
V CC
V CC
5V/div
5V/div
SDO
POK
SDO
AND POK
5V/div
I/O
I/O
I/O
I/O
CORE
AND CORE
1V/div
CORE
AND CORE
1V/div
5ms/div
Figure 1. System Power-Up/Power-Down (VI/O Rising Before
VCORE)
SYSTEM POWER-UP/POWER-DOWN
(V CORE RISING BEFORE V I/O )
5ms/div
Figure 2. System Power-Up/Power-Down Without MAX5039/
MAX5040 (VI/O Rising Before VCORE)
SYSTEM POWER-UP/POWER-DOWN
WITHOUT MAX5039/MAX5040
(V CORE RISING BEFORE V I/O )
V CC
NDRV
SDO
V CC
5V/div
NDRV
5V/div
V CC
V CC
5V/div
POK
SDO
AND POK
I/O
5V/div
I/O
I/O
I/O
CORE
AND CORE
1V/div
CORE
AND CORE
1V/div
5ms/div
Figure 3. System Power-Up/Power-Down (VCORE Rising
Before VI/O)
supply. The MAX5040 holds up I/O by driving NDRV to
V CC (because the I/O voltage is less than the CORE
voltage) until the I/O supply comes up (at around
16ms). At this point, NDRV goes to GND and POK goes
high. UVLO is driven low (at around 22ms), causing
SDO to go low, disabling the CORE and I/O supplies.
The CORE supply powers down at about 23ms and
NDRV goes to 2.8V to regulate the CORE supply until
I/O falls. Then NDRV goes to V CC when the I/O voltage
falls to the CORE voltage (at around 36ms).
Figure 8 (with MAX5040) starts out with the supplies in
their normal range. At 3ms, CORE is shorted to GND.
5ms/div
Figure 4. System Power-Up/Power-Down Without MAX5039/
MAX5040 (VCORE Rising Before VI/O)
NDRV goes high, and POK goes low immediately.
NDRV shorts the I/O supply to the CORE supply, bring-
ing the supplies down together. After 15ms, the
MAX5040 latches a fault and SDO goes low turning off
the supplies.
Detailed Description
The MAX5039/MAX5040 voltage-tracking controllers
limit the maximum differential voltage between two
power supplies during power-up, power-down, and
brownout conditions. The devices provide a shutdown
output control signal, SDO , which is used to turn on
8
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