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| 型号： | MAX5040EUB+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/21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
Pin Description
PIN
MAX5039 MAX5040
NAME
FUNCTION
1
2
1
2
SDO
V CC
Active-Low Shutdown Output. Connect SDO to active-low shutdown input of both CORE and
I/O supplies. SDO is high when V UVLO ≥ V UVCC and V CC ≥ 2.5V and if there is no fault.
Supply Voltage Input. Connect V CC to the supply voltage that powers the CORE and I/O
supplies. Bypass V CC to GND with a 1μF capacitor.
User-Programmable Undervoltage Lockout. Connect to midpoint of the voltage-divider from
3
3
UVLO
V CC to GND. Set trip point below minimum V CC voltage. V UVLO ≤ V UVCC forces SDO and
POK (MAX5040 only) low. Use UVLO as an active-low shutdown input to turn on/off the
CORE and I/O supplies if desired.
4
4
GND
Ground
CORE Feedback Input. Connect CORE_FB to the midpoint of the voltage-divider from CORE to
GND. The MAX5039/MAX5040 keep CORE_FB from dropping below V C_REF by controlling
NDRV. Any time V CORE_FB falls below V C_REF , NDRV rises above ground to a voltage
sufficient to maintain V CORE_FB = V C_REF . If V CORE_FB remains below V C_REF for longer than
5
7
CORE_FB
t FAULT , a latched FAULT is generated. During a FAULT, MAX5039/MAX5040 continue to
regulate CORE_FB.
Three things halt regulation of CORE_FB:
? If V CC falls below 2.5V, NDRV goes to GND.
? If I/O falls below CORE, NDRV goes to V CC .
? If V CORE_FB rises above V C_REF , NDRV goes to GND.
CORE Supply Sense Input. Connect CORE to the core output voltage. If V CORE > V I/O , NDRV
6
7
8
8
9
10
CORE
I/O
NDRV
goes to V CC , POK (MAX5040 only) goes low. FAULT is latched if this condition lasts longer
than t FAULT . A 20 ? bleeder discharges CORE to GND whenever SDO is low and V CC > 2.5V.
I/O Supply Sense Input. Connect to I/O output voltage. If V CORE > V I/O , NDRV goes to V CC ,
POK (MAX5040 only) drives low. A FAULT is latched if this condition lasts longer than t FAULT .
N-Channel MOSFET Gate Driver. Connect NDRV to the gate of the external N-channel
MOSFET that shunts I/O to CORE.
—
5
I/O Feedback Input. Use a resistor-divider to divide V I/O and apply to this pin. When
I/O_SENSE V I/O_SENSE ≤ V I/O_REF , POK drives low. I/O_SENSE can also be used to monitor any other
voltage.
Open-Drain Power-OK Output. POK drives low when any condition below is true:
—
6
POK
? V CC ≤ 2.5V
? V UVLO ≤ V UVCC
? V CORE_FB ≤ V C_REF
? V I/O ≤ V CORE
? V I/O_SENSE ≤ V I/O_REF
? MAX5039/MAX5040 latches a FAULT
6
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