Rainbow Electronics MAX16999 User Manual
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 programmed 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
Features
♦ Preset 0.5V to 3.3V Output Voltage Range
♦ Up to 100mA Output Current at T
A
= +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
♦ AEC-100 Qualification Request
♦ Thermal-Overload and Short-Circuit Protection
♦ Tiny 8-Pin µMAX
®
Package with Exposed Pad
MAX16999
Ultra-Low Output Voltage, Low-Quiescent-Current
Linear Regulator for High-Temperature Applications
________________________________________________________________
Maxim Integrated Products
1
Typical Operating Circuit
19-4114; Rev 0; 4/08
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
*
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-free package and RoHS compliant.
**
EP = Exposed pad.
Pin Configuration
Selector Guide appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
PART* TEMP RANGE PIN-PACKAGE
MAX16999AUA_ _+ -40°C to +125°C 8 µMAX-EP**
INPUT
2.5V TO 5.5V
C
IN
1μF
ON
OFF
OUTPUT
IN
MAX16999
EN
EP
GND
OUT
CRES
RESET
0.5V TO 3.3V
C
OUT
4.7μF
SUPPLY
C
CRES
15nF
LOGIC
TO CONTROLLER
TOP VIEW
RESET
*EXPOSED PAD
OUT
OUT
CRES
+
1
2
MAX16999
3
*
4
μMAX
8
IN
7
IN
6
EN
5
GND
MAX16999
Ultra-Low Output Voltage, Low-Quiescent-Current
Linear Regulator for High-Temperature Applications
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(For devices with V
OUT
≤ 1.5V, VIN= 3.3V. For devices with V
OUT
> 1.5V, VIN= 5V. EN = IN, TJ= -40°C to +125°C, CIN= 1µF, C
OUT
= 4.7µF, C
CRES
= 1000pF, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
IN, RESET to GND.................................................-0.3V to +6.0V
OUT, CRES, EN to GND ..............................-0.3V to (V
IN
+ 0.3V)
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (T
A
= +70°C) (Note 1)
(derate 10.3mW/°C above +70°C)
8-Pin µMAX (single-layer PCB) ..................................824.7mW
(derate 12.9mW/°C above +70°C)
8-Pin µMAX (multilayer PCB)....................................1030.9mW
Package Junction-to-Case Thermal Resistance (θ
JC
) ......4.8°C/W
Package Junction-to-Ambient Thermal Resistance (θ
JA
)
(single-layer PCB) ........................................................97°C/W
Package Junction-to-Ambient Thermal Resistance (θ
JA
)
(multilayer PCB) ........................................................77.6°C/W
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Note 1: Package thermal resistances were obtained using the method described in JEDEC specifications. For detailed information
on packaging thermal considerations, refer to www.maxim-ic.com/thermal-tutorial
.
IN Operating Voltage V
IN Undervoltage-Lockout (UVLO)
Threshold
IN UVLO Hysteresis 45 mV
Output-Voltage Accuracy VIN = V
Current Limit I
Ground Current I
Dropout Voltage VIN - V
Load Regulation ΔV
Line Regulation ΔV
Power-Supply Rejection Ratio PSRR
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
IN
V
OUT
OUT
UVLO
LIM
Q
/ΔI
VIN rising 1.94 2.2 V
OUT
OUT = GND 105 150 mA
I
= 100µA 13 20
OUT
I
= 100mA 23
OUT
OUTIOUT
OUTIOUT
/ΔVINI
= 80mA, V
= 1mA to 80mA 0.1 mV/mA
= 80mA
OUT
I
= 10mA,
OUT
500mV
P-P, VIN
> 1.5V
V
OUT
2.5 5.5 V
V
≤ 1.5V,
OUT
= 1mA to 80mA
I
+ 2V
OUT
V
> 1.5V,
OUT
= 1mA to 100mA
I
OUT
= 3.3V (Note 2) 0.035 0.1 V
OUT
V
< 1V,
OUT
2.5V < V
V
OUT
1.5V) < V
f = 100Hz 70
f = 100kHz 40
< 5.5V
IN
≥ 1V, (V
< 5.5V
IN
OUT
+
-2.5 +2.5
-2.5 +2.5
0.4
1.8
%
µA
mV/V
dB
MAX16999
Ultra-Low Output Voltage, Low-Quiescent-Current
Linear Regulator for High-Temperature Applications
_______________________________________________________________________________________ 3
Note 2: Limits are 100% production tested at TA= +25°C. Limits over the operating temperature range are guaranteed by design.
Note 3: Dropout voltage is defined as V
IN
- V
OUT
when V
OUT
is 2% below its value for VIN= V
OUT
+ 2V.
DC ELECTRICAL CHARACTERISTICS (continued)
(For devices with V
OUT
≤ 1.5V, VIN= 3.3V. For devices with V
OUT
> 1.5V, VIN= 5V. EN = IN, TJ= -40°C to +125°C, CIN= 1µF, C
OUT
= 4.7µF, C
CRES
= 1000pF, unless otherwise noted. Typical values are at TA= +25°C.) (Note 1)
EN
Standby Current I
Turn-On Delay From EN = high to V
Logic Levels
Pullup Resistance R
Pulldown Resistance R
RESET
Threshold Accuracy V
Threshold Hysteresis V
RESET Open-Drain Leakage RESET = high impedance, V
Output Low Voltage V
RESET T i m e o u t t
O u tp u t D eg l i t c h T i m e t
C R ES
Charge Current I
Discharge Current I
Threshold V
T H E R M A L P R O T E C T I O N
T h er m al - S h u td o w n Te m p er a tu r e T
Thermal-Shutdown Hysteresis ΔT
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
STB
EN
EN
EN-H
EN-L
RES
RES,HYST
RES,OLILOAD
R S OF F
D E GL I T C H VOUT
CRES,UP
CRES,DN
CRES,THRS
S H D N
S H D N
EN = GND 0.3 1 µA
OUT
Circuit active 70
H
Circuit inactive 30
L
VEN = 75% V
VEN = 25% V
V
OUT
CRES = GND 30 80 m s
RESET goes from low to high impedance 575 600 625 mV
IN
IN
falling 79.5 82.5 85.5 %V
= 250µA 100 mV
< V
RES
= 100mV 10 µs
%V
120 kΩ
120 kΩ
2.5 %V
= 5mV 200 nA
RESET
30 µs
81012µA
1mA
+ 1 65 ° C
1 5 ° C
IN
OUT
OUT
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