MAX15027ATB+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX15027ATB+T ,1.425V to 3.6V Input, 1A Low-Dropout Regulators with BIAS InputApplicationsPin ConfigurationsAutomotive (Dead-Man LDO)ServersTOP VIEWStorageNetworking +IN 1 10 OU ..
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MAX15027ATB+T
1.425V to 3.6V Input, 1A Low-Dropout Regulators with BIAS Input
MAX15027/MAX150281.425V to 3.6V Input, 1A Low-Dropout
Regulators with BIAS Input
General Description
The MAX15027/MAX15028 low-dropout linear regulators
operate from input voltages as low as 1.425V and deliver
up to 1A of continuous output current with a typical
dropout voltage of only 75mV. The output voltage is
adjustable from 0.5V to VINand is ±2% accurate over load
and line variations, from -40°C to +125°C. The MAX15028
features a BIAS input of 3V to 5.5V from an always-on
power supply. The BIAS input current is reduced down to
less than 2µA during shutdown.
These regulators use small, 1µF ceramic input capaci-
tors and 4.7µF ceramic output capacitors to deliver 1A
output current. High bandwidth provides excellent tran-
sient response and limits the output voltage deviation to
15mV for a 500mA load step, with only a 4.7µF ceramic
output capacitor, and the voltage deviations can be
reduced further by increasing the output capacitor.
These devices offer a logic-controlled shutdown input
to reduce input current (IIN) consumption down to less
than 5.5µA in standby mode. Other features include a
soft-start to reduce inrush current, short-circuit protec-
tion, and thermal-overload protection.
The MAX15028 features a BIAS input allowing a sec-
ondary supply to keep the LDO’s internal circuitry alive
if the voltage on IN goes to 0V. Both devices are fully
specified from -40°C to +125°C and are available in a
10-pin thermally enhanced TDFN package (3mm x
3mm) that includes an exposed pad for optimal power
dissipation. For a 500mA version of these LDOs, refer
to the MAX15029/MAX15030 data sheet.
Applications
Automotive (Dead-Man LDO)
Servers
Storage
Networking
Base Stations
Optical Modules
ATE
Features1.425V to 3.6V Input Voltage RangeOutput Voltage Programmable from 0.5V to VINGuaranteed Maximum 225mV Dropout at 1A Output
Current±2% Output Accuracy Over Load, Line, and
TemperatureStable with Ceramic CapacitorsFast Transient Response60µA Operating Bias Supply Current (MAX15028)1.2µA Shutdown Bias Supply Current (MAX15028)Short-Circuit and Thermal Protection-40°C to +125°C Operating Temperature RangeSoft-Start Limits Inrush CurrentThermally Enhanced 3mm x 3mm TDFN PackageAEC-Q100 Qualified+
OUT
GND
I.C.
MAX15027OUTINSSEN
TDFN
(3mm x 3mm)
TOP VIEW
Pin Configurations
Ordering Information
Pin Configurations continued at end of data sheet.
PARTTEMP RANGEPIN-
PACKAGE
TOP
MARK
MAX15027ATB+T- 40°C to + 125°C 10 TDFN-EP*+AUD
MAX15027ATB/V+T- 40°C to + 125°C 10 TDFN-EP*+AWC
MAX15028ATB+T- 40°C to + 125°C 10 TDFN-EP*+AUE
+Denotes a lead(Pb)-free/RoHS-compliant package.
For tape-and-reel orders, add a “T” after the “+”.
*EP = Exposed pad.
/V denotes an automotive qualified part.
Typical Operating Circuits appear at end of data sheet.
MAX15027/MAX150281.425V to 3.6V Input, 1A Low-Dropout
Regulators with BIAS Input
Absolute Maximum Ratings
Electrical Characteristics
(Circuit of Figure 1; VIN= 1.8V, VOUT= 1.2V, EN = IN for MAX15027, EN = BIAS for MAX15028, IOUT= 100mA, TA= TJ= -40°C to
+125°C. Typical values are at TA= +25°C, unless otherwise noted.) (Note 2)
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, FB, SS, I.C. to GND..........................................-0.3V to +4.0V
BIAS to GND.............................................................-0.3V to +6V
EN to GND................-0.3V to the lower of (VBIAS+ 0.3V) or +6V
OUT to GND................................................-0.3V to (VIN+ 0.3V)
Output Short-Circuit Duration.....................................Continuous
Continuous Power Dissipation (TA= +70°C)
10-Pin TDFN, Multilayer Board
(derate 24.4mW/°C above +70°C)..............................1951mW
Junction-to-Case Thermal Resistance, θJC.......................9°C/W
Junction-to-Ambient Thermal Resistance, θJA(Note 1)...41°C/W
Operating Junction Temperature Range...........-40°C to +125°C
Maximum Junction Temperature.....................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Soldering Temperature (reflow).......................................+260°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
MAX150271.4253.600
VBIAS = 3V to 5.5V1.4253.600Input Voltage RangeVINMAX15028BIAS = IN3.0003.600
MAX150271.2751.3251.375Undervoltage LockoutVUVLOVIN rising,
IOUT = 2mAMAX150281.041.1061.14V
Undervoltage Lockout HysteresisVUVLO_HYST50mV
VIN = 1.425V to 3.6V, VOUT = 1.2V,
IOUT = 1mA, VBIAS = 3.3V160275410
VIN = 3.6V, VOUT = 3.3V, IOUT = 100mA180275560Quiescent GND CurrentIGND
VIN = 3.3V, VOUT = 3.3V, IOUT = 500mA170315470
Input Supply Current in ShutdownIIN_SDVEN = 0V, TA = - 40°C to + 85°C 0.15.5µA
BIAS (MAX15028)
Input Voltage RangeVBIAS35.5V
Undervoltage LockoutVBIAS_UVLOVBIAS rising, IOUT = 2mA2.32.52.7V
Undervoltage Lockout HysteresisIOUT = 2mA110mV
Quiescent Input Supply CurrentIBIASVEN = VBIAS2060120µA
VIN = 0V, VOUT = 0V,
VBIAS = 3.3V1.22I N = 3.3V , V OU T = 0V ,B I AS = 3.3V 1.22Input Supply Current in ShutdownIBIAS_SDEN = GNDI N = 3.3V , V OU T = 0V ,B I AS = 5V 1.53
Note 1:Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
MAX15027/MAX150281.425V to 3.6V Input, 1A Low-Dropout
Regulators with BIAS Input
Electrical Characteristics (continued)
(Circuit of Figure 1; VIN= 1.8V, VOUT= 1.2V, EN = IN for MAX15027, EN = BIAS for MAX15028, IOUT= 100mA, TA= TJ= -40°C to
+125°C. Typical values are at TA= +25°C, unless otherwise noted.) (Note 2)
Note 2:All devices are 100% production tested at TA= +25°C. Limits over the operating temperature range are guaranteed by
design and characterization.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
OUT
Output Voltage RangeVOUT0.53.3V
Load RegulationIOUT = 1mA to 1A0.01mV/mA
Line RegulationVIN = 1.425V to 3.6V, IOUT = 1mA4mV
Dropout Voltage (VIN - VOUT)VDOIOUT = 1A, VIN = 1.5V75225mV
Output Current LimitILIMVFB = 300mV1.41.72.0A
Threshold AccuracyVFBVOUT = 0.5V to 3.3V, VIN = (VOUT + 0.3V)
to 3.6V, IOUT = 1mA to 1A0.4890.4990.509mV
Input CurrentIFBVFB = 0.688V0.10.2µA
EN/SOFT-START
VIH1.05Enable Input Threshold
(MAX15028)VILVBIAS = 5V0.4V
VIH1.05Enable Input Threshold
(MAX15027)VILVIN = 1.8V0.4V
Soft-Start Charging CurrentISS5µA
Soft-Start Reference VoltageVSS0.499V
THERMAL SHUTDOWN
Thermal-Shutdown ThresholdTJ rising165°C
Thermal-Shutdown Hysteresis15°C
MAX15027/MAX150281.425V to 3.6V Input, 1A Low-Dropout
Regulators with BIAS Input
MAX15028 BIAS CURRENT (IBIAS)
vs. BIAS VOLTAGE (VBIAS)
MAX15027 toc04
BIAS VOLTAGE (V)
BIAS CURRENT (1453
IOUT = 0
MAX15028 BIAS CURRENT (IBIAS)
vs. OUTPUT CURRENT
MAX15027 toc05
OUTPUT CURRENT (mA)
BIAS CURRENT (
VBIAS = 3.3V
VBIAS = 5.5V
GROUND CURRENT
vs. OUTPUT CURRENT
MAX15027 toc06
LOAD CURRENT (A)
GROUND CURRENT (mA)
VBIAS = 3.3V
Typical Operating Characteristics
(Circuit of Figure 1, VIN= 1.8V, VOUT= 1.5V, IOUT= 1A, TA= +25°C, unless otherwise noted.)
MAX15028
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX15027 toc01
INPUT VOLTAGE (V)
OUTPUT VOLTAGE (V)
IOUT = 0
VBIAS = 3.3V
MAX15028
OUTPUT VOLTAGE vs. OUTPUT CURRENT
MAX15027 toc02
OUTPUT CURRENT (mA)
OUTPUT VOLTAGE (V)
VBIAS = 3.3V
INPUT CURRENT (IIN)
vs. INPUT VOLTAGE (VIN)
MAX15027 toc03
INPUT VOLTAGE (V)
INTPUT CURRENT (mA)
VBIAS = 3.3V
MAX15028 DROPOUT VOLTAGE
vs. OUTPUT CURRENT
MAX15027 toc07
DROPOUT VOLTAGE (mV)
VBIAS = 3.3V
VIN = 1.4V
MAX15028 DROPOUT VOLTAGE
vs. OUTPUT CURRENT
MAX15027 toc07
OUTPUT CURRENT (mA)
DROPOUT VOLTAGE (mV)
VBIAS = 3.3V
VIN = 1.4V
MAX15027/MAX150281.425V to 3.6V Input, 1A Low-Dropout
Regulators with BIAS Input
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN= 1.8V, VOUT= 1.5V, IOUT= 1A, TA= +25°C, unless otherwise noted.)
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX15027 toc11
1MHz100Hz
10dB/div
50dB
MAX15028 FB VOLTAGE (VFB)
vs. TEMPERATURE
MAX15027 toc12
TEMPERATURE (°C)
FB VOLTAGE (V
) (V)0201006080-20120
VBIAS = 3.3V
TURN-ON VIA ENABLE RESPONSE
MAX15027 toc10a
2ms/div
1V/div
2V/div
VOUT
VEN
IOUT = 500mA
TURN-OFF VIA ENABLE RESPONSE
MAX15027 toc10b
4μs/div
VOUT
VEN
IOUT = 500mA
1V/div
2V/div
POWER-UP RESPONSE
MAX15027 toc09a
2ms/div
1V/div
2V/div
VOUT
VIN
IOUT = 500mA
POWER-DOWN RESPONSE
MAX15027 toc09b
10μs/div
1V/div
2V/div
VOUT
VIN
IOUT = 500mA
MAX15027/MAX150281.425V to 3.6V Input, 1A Low-Dropout
Regulators with BIAS Input
Pin Description
PIN
MAX15027MAX15028NAMEFUNCTION
1, 2, 31, 2INRegulator Input. 1.425V to 3.6V voltage range. Bypass to GND with at least 1µF
of ceramic capacitance. IN is high impedance when the LDO is shut down.3BIASInternal Circuitry Supply Input. BIAS supplies the power for the internal circuitry.
3V to 5.5V voltage range.4I.C.Internally Connected. Connect I.C. directly to GND.EN
LDO Enable. Drive EN high to enable the LDO or connect to IN (BIAS for
MAX15028) for always-on operation. Drive EN low to disable the LDO and place
the IC in low-power shutdown mode.SS
Soft-Start Input. For typical operation, connect a 0.1µF capacitor from SS to
GND. The soft-start timing is dependent on the value of this capacitor. See the
Soft-Start section.FB
Feedback Input. Connect FB to the center of a resistor-divider connected
between OUT and GND to set the output voltage. See the Programming the
Output Voltage section.8GNDGround
9, 109, 10OUTRegulator Output. Bypass OUT to GND with at least 4.7µF of ceramic
capacitance for 1A load operation.EPExposed Pad. Connect EP to GND and a large copper ground plane to facilitate
package power dissipation.
OVERCURRENT THRESHOLD
vs. TEMPERATURE
MAX15027 toc13
TEMPERATURE (°C)
OVERCURRENT THRESHOLD (A)0201006080-20120
VBIAS = 3.3V
CASE TEMPERATURE RISE
vs. POWER DISSIPATION
MAX15027 toc14
POWER DISSIPATION (W)
CASE TEMPERATURE RISE (2.52.01.51.00.5
Typical Operating Characteristics (continued)
(Circuit of Figure 1, VIN= 1.8V, VOUT= 1.5V, IOUT= 1A, TA= +25°C, unless otherwise noted.)

Partno	Mfg	Dc	Qty	Available	Descript
MAX15027ATB+T \|MAX15027ATBT	MAXIM	N/a	4959	avai	1.425V to 3.6V Input, 1A Low-Dropout Regulators with BIAS Input