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MAX8635ETA+T

P1-P3P4-P6P7-P9P10-P12P13-P13
General Description
The MAX8633–MAX8636 offer low-dropout (LDO) volt-
age and ultra-low-power regulation in a subminiaturized
2mm x 2mm µDFN package. The devices operate from
a 2.7V to 5.5V supply and deliver up to 300mA from
each output, with a typical dropout voltage of 90mV at
100mA load current. Each device is designed with
internal p-channel MOSFET pass transistors to ensure a
low-quiescent supply current of 54µA (typical, both
LDOs on). Other features include low-noise operation
(MAX8634/MAX8636), output current limiting, and ther-
mal shutdown.
The MAX8633 features an open-drain, active-low
RESET output to monitor OUT2, eliminating external
components and adjustments. The MAX8633 asserts a
RESET signal (120ms minimum timeout) when VOUT2
drops below 87% of the nominal output voltage. The
MAX8634/MAX8636 feature a noise bypass input to the
internal reference for low output noise (45µV
RMS
typ).
The MAX8634/MAX8635 provide independent SHDN
inputs for disabling the regulators, while the MAX8633/
MAX8636 provide a single SHDN input for disabling
both regulators.
The MAX8633/MAX8635/MAX8636 have two logic
inputs that select one of nine preset output-voltage
combinations, eliminating external 1% resistors, as well
as inventory burden. The MAX8634 has one logic input
to select three output-voltage options.
The MAX8633–MAX8636 are available in an 8-pin, 2mm
x 2mm µDFN package for minimizing footprint, and an
8-pin, 3mm x 3mm TDFN package for higher power dis-
sipation. The devices are specified over the extended
temperature range (-40°C to +85°C). All packages are
lead free.
Applications
Cellular and Cordless Phones
PDAs and Digital Cameras
Small LCD Displays
Notebook Computers
Wireless LAN Cards
Handheld Instruments
Features
♦ Pin-Programmable Output Voltages
♦ 300mA Output Current
♦ Low 90mV Dropout at 100mA Load
♦ Open-Drain, Active-Low RESET (MAX8633)
♦ Low 45µV
RMS
Output Noise (MAX8634/MAX8636)
♦ Low 54µA Quiescent Supply Current
♦ Low < 1µA Maximum Shutdown Current
♦ Output Current Limit
♦ Thermal Shutdown
MAX8633–MAX8636
Dual 300mA Pin-Programmable LDO
Linear Regulators
________________________________________________________________
Maxim Integrated Products
1
Ordering Information
MAX8633
IN
SHDN
OUT2
OUT2
GND
OUT1
RESET
P2
P1
C
OUT1
2.2μF
C
IN
2.2μF
C
OUT2
2.2μF
INPUT
2.7V TO 5.5V
Typical Operating Circuits
19-0516; Rev 1; 9/08
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
+
Denotes a lead-free/RoHS-compliant package.
Ordering Information continued at end of data sheet.
Pin Configurations and Selector Guide appear at end of
data sheet.
EVALUATION KIT
AVAILABLE
PART TEMP RANGE
PIN-
PACKAGE
TOP
MARK
MAX8633ELA+ -40°C to +85°C
8 µDFN
2mm x 2mm
AAH
MAX8633ETA+ -40°C to +85°C
8 TDFN
3mm x 3mm
AOQ
MAX8634ELA+ -40°C to +85°C
8 µDFN
2mm x 2mm
AAI
Typical Operating Circuits continued at end of data sheet.
MAX8633–MAX8636
Dual 300mA Pin-Programmable LDO
Linear Regulators
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= 3.7V, SHDN = SHDN1 = SHDN2 = IN, P = P1 = P2 = GND, C
IN
= 2.2µF, C
OUT1
= 2.2µF, C
OUT2
= 2.2µF, C
BP
= 0.01µF, T
A
=
-40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +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.
(All voltages refer to GND, unless otherwise noted.)
IN ...........................................................................-0.3V to +6.0V
SHDN, SHDN1, SHDN2, RESET,
P, P1, P2, BP, OUT1, OUT2.....................-0.3V to (V
IN
+ 0.3V)
Continuous Output Short-Circuit Duration..................Continuous
Continuous Power Dissipation (T
A
= +70°C)
8-Pin µDFN 2mm x 2mm
(derate 4.8mW/°C above +70°C).................................380mW
8-Pin TDFN 3mm x 3mm
(derate 23.8mW/°C above +70°C).............................1904mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Voltage V
IN
2.7 5.5 V
Input Undervoltage
Lockout
V
UVLO
V
IN
rising; hysteresis = 95mV (typ) 2.15 2.25 2.35 V
I
OUT_
= 0mA 54 75
I
OUT_
= 100mA 60Ground Current I
Q
I
OUT_
= 10mA, dropout (Note 2) 60
µA
T
A
= +25°C 0.005 1
Shutdown Supply
Current
I
OFF
SHDN_ = GND
T
A
= +85°C 0.01
µA
OUT1, OUT2
I
OUT_
= 70mA; T
A
= +25°C -0.7 +0.7
I
OUT_
= 70mA -1 +1
Output Voltage
Accuracy (for Any
Output Voltage)
I
OUT_
= 0.1mA to 300mA; V
IN
= (V
OUT_
+ 0.5V) to
5.5V
-1.8 +1.7
%
Current Limit I
LIM
OUT_ = 0V 400 500 600 mA
Drop-Out Voltage V
IN
- V
OUT
V
OUT_
= 2.8V (MAX8633);
V
OUT_
= 2.85V (MAX8634/MAX8635/MAX8636);
I
OUT_
= 100mA (Note 2)
90 200 mV
MAX8633
MAX8635
450
Output Noise
f = 10Hz to 100kHz;
I
OUT_
= 10mA
MAX8634
MAX8636
45
µV
RMS
f < 1kHz 60
Output AC Power-
Supply Rejection
Ratio
PSRR I
OUT_
= 30mA
f < 10kHz 55
dB
MAX8633–MAX8636
Dual 300mA Pin-Programmable LDO
Linear Regulators
_______________________________________________________________________________________ 3
Note 1: All units are 100% tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed by design.
Note 2: The dropout voltage is defined as V
IN
- V
OUT_
when V
OUT_
drops by 100mV from V
OUT_
when measured at V
IN
= +3.7V.
Note 3: Connect P_ to IN or GND through a resistor less than 1kΩ.
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 3.7V, SHDN = SHDN1 = SHDN2 = IN, P = P1 = P2 = GND, C
IN
= 2.2µF, C
OUT1
= 2.2µF, C
OUT2
= 2.2µF, C
BP
= 0.01µF, T
A
=
-40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SHUTDOWN INPUTS (SHDN, SHDN1, AND SHDN2)
Input Voltage High V
IH
V
IN
= 2.7V to 5.5V 1.5
Input Voltage Low V
IL
V
IN
= 2.7V to 5.5V 0.5
V
T
A
= +25°C 0.1 1000
Input Bias Current I
SHDN_
V
IN
= 2.7V to 5.5V;
V
SHDN_
= GND or IN
T
A
= +85°C1
nA
Turn-On Delay
From SHDN = high to 87% of V
OUT_
;
I
OUT_
= 70mA
90 µs
TRI-LEVEL INPUTS (P, P1, P2)
For high or low state 1
Ter m i nati on
Resi stance to IN or
G N D for S etti ng H i g h,
O p en, and Low S tates
IN = 2.7 to 5.5V
For open state 100
kΩ
Input Load
Capacitance for
Open State
Design guide only 50 pF
RESET
RESET High
Threshold
Percent of nominal OUT2; OUT2 rising 84 87 90 %
RESET Threshold
Hysteresis
Percent of nominal OUT2; OUT2 falling 4.5 %
I
RESET
= 20µA; V
IN
= 1.0V 10 100
RESET Output
Voltage Low
I
RESET
= 500µA; V
IN
= 3.7V 5 100
mV
T
A
= +25°C 0.1 300
RESET Output High
Leakage Current
I
LEAK
V
RESET
= V
IN
= 5.5V
T
A
= +85°C1
nA
RESET Delay t
RP
From OUT2 rising to RESET rising 120 150 180 ms
THERMAL PROTECTION
Thermal-Shutdown
Threshold
T
SHDN
+165 °C
Thermal-Shutdown
Hysteresis
ΔT
SHDN
15 °C
P1-P3P4-P6P7-P9P10-P12P13-P13

MAX8635ETA+T

Mfr. #:
Buy MAX8635ETA+T
Manufacturer:
Maxim Integrated
Description:
LDO Voltage Regulators Dual 300mA Pin-Prog LDO
Lifecycle:
New from this manufacturer.
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