MAX16999
Ultra-Low Output Voltage, Low-Quiescent-Current
Linear Regulator for High-Temperature Applications
General Description
The MAX16999 linear regulator operates from a 2.5V to
5.5V input voltage and delivers 100mA continuous load
current with a low quiescent current typically around
13μA. The output voltage is preset to internally trimmed
voltages in the 0.5V to 3.3V range (see the Selector
Guide). An active-low, open-drain reset output remains
low for a programmable timeout delay after the output
voltage reaches regulation. The reset timeout is pro-
grammed by an external capacitor connected to CRES.
This device also features logic-controlled shutdown, and
short-circuit and thermal-overload protection. The typical
applications are multimedia, telematics, and motor control
microcontrollers (μCs) with always-on requirements. The
MAX16999 is used as a parallel, lowquiescent supply to
power the core or interrupt section of μCs during sleep
mode. It can also be used to supply a timer or memory
during μC shutoff. The adjustable POR delay assists with
power-supply sequencing.
Applications
●● Industrial
●● SDRAM Power Supplies
●● Keep-Alive Timers
●● Handheld/Portable Devices
Typical Operating Circuit
Features
●● Preset 0.5V to 3.3V Output Voltage Range
●● Up to 100mA Output Current at TA = +125°C
●● 13μA Quiescent Current
●● Logic-Controlled Enable
●● Adjustable POR Delay Flag
●● Short to GND Protection on Reset Timer
●● Used in Parallel with High-Current Supply of Equal
Voltages
●● Thermal-Overload and Short-Circuit Protection
●● Tiny 8-Pin μMAX® Package with Exposed Pad
Ordering Information
PART*
MAX16999AUA_ _+
TEMP RANGE
-40°C to +125°C
PIN-PACKAGE
8 µMAX-EP**
*Insert the desired two-digit suffix (see the Selector Guide) into
the blanks to complete the part number. Contact the factory for
other output voltages or other package options.
+Denotes a lead(Pb)-free/RoHS-compliant package.
**EP = Exposed pad.
Selector Guide appears at end of data sheet.
Pin Configuration
INPUT
2.5V TO 5.5V
CIN
1µF
ON
OFF
IN
OUT
MAX16999
EN
CRES
RESET
EP GND
OUTPUT
0.5V TO 3.3V
COUT
4.7µF
LOGIC
SUPPLY
CCRES
15nF
TO CONTROLLER
TOP VIEW
OUT 1 +
OUT 2
CRES 3
MAX16999
RESET 4
*
µMAX
8 IN
7 IN
6 EN
5 GND
*EXPOSED PAD
μMAX is a registered trademark of Maxim Integrated Products,
Inc.
19-4114; Rev 2; 2/15