Datasheet
(V
IN
= +14V, C
IN
= 10μF, C
OUT
= 15μF, V
EN
= +2.4V, V
OUT
= +5V, SET = GND, T
A
= +25°C, unless otherwise specied.)
PIN
NAME FUNCTION
MAX5023 MAX5024
1 1 IN
Regulator Input. Supply voltage ranges from +6.5V to +65V. Bypass with a 10µF capacitor to
GND.
2 2 EN
Enable Input. Force EN high to turn on the regulator. Pull EN low and force HOLD high (or
open circuit) to place the device in shutdown mode. Internally connected to ground through a
5MΩ resistor.
3 3 GND
Ground. GND also functions as a heatsink. Solder to large pads or the circuit-board ground
plane to maximize thermal dissipation.
4 4
RESET
Active-Low Open-Drain Reset Output. RESET remains low while V
OUT
is below the reset
threshold or when WDI is not pulsed within 1.6s. RESET remains low for the duration of the
reset timeout period after the reset conditions are terminated.
5 5
HOLD
Regulator Hold Input. When HOLD is forced low, the regulator stores the on state of the
output allowing the regulator to function even if EN is pulled low. To shutdown the regulator,
release HOLD after EN is pulled low. If HOLD is unused, either oat HOLD or connect to OUT.
Internally connected to OUT through a 4µA pullup current source (see Table 1, Truth Table).
6 6 N.C. No Connection. Not internally connected.
7 — WDI
Watchdog Timer Input (MAX5023 only). The watchdog timer asserts a reset if WDI does not
transition within the 1.6s watchdog timeout period. WDI cannot be disabled.
8 8 OUT
Regulator Output. Fixed (+3.3V or +5V) or adjustable (+2.5V to +11V). Bypass with a 15µF
capacitor (min).
— 7 SET
Feedback Input for Setting the Output Voltage. Connect to GND to set the output voltage
to the preset xed value (+3.3V or +5V). Connect to an external resistor-divider network for
adjustable output operation (MAX5024 only).
EP EP PAD Exposed Pad. Connect pad to GND.
0
10
5
20
15
25
30
47 5453 56 575548 5251 58 60 6159 80
GROUND-CURRENT DISTRIBUTION
(T
A
= +40°C)
MAX5023toc18
I
GND
(µA)
NUMBER OF UNITS
0
10
5
20
15
25
30
45 5958 61 626053 5756 63 65 8964
GROUND-CURRENT DISTRIBUTION
(T
A
= +125°C)
MAX5023toc19
I
GND
(µA)
NUMBER OF UNITS
MAX5023/MAX5024 65V, Low-Quiescent-Current, High-Voltage Linear
Regulators with μP Reset and Watchdog Timer
Maxim Integrated
│
7
www.maximintegrated.com
Typical Operating Characteristics (continued)
Pin Description