MAX5040EUB+ Maxim Integrated Products, MAX5040EUB+ Datasheet - Page 6

• Manufacturer Part Number: MAX5040EUB+
• Description: IC CNTRLR VOLT TRACK 10-UMAX
• Manufacturer: Maxim Integrated Products

Specifications of MAX5040EUB+

• Applications: Processor
• Current - Supply: 1.3mA
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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