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MAX5087BATE+T ,45V, 400mA, Low-Quiescent-Current Linear Regulator with Adjustable Reset DelayApplicationsMAX5087BATE+ 16 TQFN-EP* 5.0● IndustrialMAX5087BATE/V+ 16 TQFN-EP* 5.0● Home Security/S ..
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MAX5087BATE+T
45V, 400mA, Low-Quiescent-Current Linear Regulator with Adjustable Reset Delay
General Description
The MAX5087 high-voltage linear regulator operates
from an input voltage of 6.5V to 45V and delivers up
to 400mA of output current. The device consumes only 70μA of quiescent current with no load and 11μA in shutdown. The device includes a SET input, that when connected to ground, selects a preset output voltage of 3.3V (MAX5087A) or 5.0V (MAX5087B). Alternatively, the output voltage can be adjusted from 2.5V to 11V by simply connecting SET to the regulator’s output through a resis-tive divider network. The MAX5087 also provides an open-drain, active-low microprocessor (μP) reset output that asserts when the regulator output drops below the preset
output voltage threshold. An external capacitor programs
the reset timeout period. Other features include an enable input, thermal shutdown, and short-circuit protection.
The MAX5087 operates over the automotive temperature range of -40°C to +125°C and is available in a 16-pin TQFN thermally enhanced package.
Applications●Industrial●Home Security/Safety●Networking
Features●Wide Operating Input Voltage Range (6.5V to 45V)●Thermally Enhanced Package Dissipates 2.6W at TA = +70°C (16-Pin TQFN)●Guaranteed 400mA Output Current●70μA Quiescent Supply Current●Preset 3.3V, 5.0V, or Adjustable 2.5V to 11V Output
Voltage●Remote Load Sense Capability●Enable Input●Integrated μP Reset Circuit with Programmable Timeout Period●Thermal and Short-Circuit Protection●-40°C to +125°C Operating Temperature Range
Note: All devices are specified over the -40°C to +125°C oper-
ating temperature range.
*EP = Exposed paddle.
+Denotes lead-free package.
PARTPIN-PACKAGEOUTPUT
VOLTAGE (V)
MAX5087AATE+16 TQFN-EP*3.3
MAX5087BATE+16 TQFN-EP*5.0
MAX5087BATE/V+16 TQFN-EP*5.011109
OUT
OUT
OUTSENSE
GND
TOP VIEW
N.C.
N.C.
N.C.
N.C.234
N.C.IN
MAX5087
N.C.CT
RESET
SET
TQFN
MAX508745V, 400mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Ordering Information
Pin Coniguration
EVALUATION KIT AVAILABLE
IN to GND (do not exceed package power
dissipation)..........................................................-0.3V to +50VIN to GND (T ≤ 300ms, IOUT ≤ 250mA)..................-0.3V to +42VEN to GND..............................................................-0.3V to +50V
RESET, OUT, OUTSENSE to GND.........................-0.3V to +12V
IN to OUT................................................................-0.3V to +50VCT, SET TO GND....................................................-0.3V to +35VShort-Circuit Duration (VIN ≤ 14V)..............................Continuous
Maximum Current into Any Pin (Except IN, OUT).............±20mAContinuous Power Dissipation (TA = +70°C) 16-Pin TQFN (derate 33.3mW/°C above +70°C).......2666mWOperating Temperature Range...........................-40°C to +125°CJunction Temperature.......................................................+150°CStorage Temperature Range..............................-60°C to +150°CLead Temperature (soldering, 10s)...................................+300°C
TQFN Junction-to-Ambient Thermal Resistance (θJA)........30.0°C/W Junction-to-Case Thermal Resistance (θJC)..................2°C/W
(Note 1)
(VIN = 14V, IOUT = 1mA, CIN = 47μF (low ESR), COUT = 15μF, VEN = 2.4V, 10kΩ from RESET to OUT, TA = TJ = -40°C to +125°C,
unless otherwise noted. Typical specifications are at TA = +25°C.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Input Voltage RangeVINVIN ≥ VOUT + 1.5V 6.545.0V
Supply CurrentIQMeasured at GND,SET = GND
IOUT = 070150IOUT = 400mA5300
Shutdown Supply CurrentISHDNVEN P 0.4V1121µA
REGULATOR
Guaranteed Output CurrentIOUTVIN = 6.5V, VOUT = 5.0V 400mA
Output Voltage (Note 3)VOUT
SET = GND,
5V version
6.5V P VIN ≤ 25V,5mA P IOUT ≤ 400mA4.8755.13
6.5V P VIN ≤ 45V,5mA P IOUT ≤ 100mA4.85055.150
SET = GND,
3.3V version
6.5V P VIN ≤ 25V,5mA P IOUT ≤ 400mA3.2083.33.392
6.5V P VIN ≤ 45V,5mA P IOUT ≤ 100mA3.2083.33.392
IOUT = 5mA, adjustable range2.511.0
Dropout VoltageΔVDOIOUT = 400mA, VOUT = 5V (Note 4)0.92.2V
Startup Response TimeRising edge of VIN to VOUT,
RL = 500Ω, SET = GND (Note 5)400µs
Line RegulationΔVOUT /ΔVIN8V ≤ VIN ≤ 45V5V version-1+1mV/V3.3V version-0.5+0.5
Enable VoltageVENVEN = high, regulator on2.4V
MAX508745V, 400mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
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.
Absolute Maximum Ratings
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.
Package Thermal Characteristics
Electrical Characteristics
(VIN = 14V, IOUT = 1mA, CIN = 47μF (low ESR), COUT = 15μF, VEN = 2.4V, 10kΩ from RESET to OUT, TA = TJ = -40°C to +125°C,
unless otherwise noted. Typical specifications are at TA = +25°C.) (Note 2)
Note 2: Limits at TA = -40°C are guaranteed by design.
Note 3: Output voltage is tested using a pulsed load current of less than 50ms duration.
Note 4: Dropout voltage is defined as (VIN - VOUT) when VOUT is 100mV below the value of VOUT for VIN = VOUT + 3V.
Note 5: Startup time measured from 50% of VIN to 90% of VOUT.
Note 6: Continuous short-circuit protection for VIN > 14V not guaranteed.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Enable Input CurrentIENVEN = 2.4V0.35µA
VEN = 14V3.4
SET Reference VoltageVSET1.2001.2351.260V
SET Input Leakage CurrentISET-100+0.5+100nA
Load RegulationΔVOUT / ΔIOUTIOUT = 1mA to 400mA (Note 3)0.10.35Ω
Power-Supply Rejection RatioPSRRIOUT = 10mA, f = 100Hz, 500mVP-P,
VOUT = 5V70dB
Short-Circuit CurrentISCVIN < 14V (Note 6)640mA
Thermal Shutdown TemperatureTJ(SHDN)175°C
Thermal Shutdown HysteresisΔTJ(SHDN)25°C
RESET Voltage Threshold VRESET899294% VOUT
RESET Threshold HysteresisVRHYST2% VOUT
RESET Output Low VoltageVRLISINK = 1mA0.4V
RESET Output Leakage CurrentIRHVRESET = 5V1µA
RESET Output Minimum Timeout Period
When VOUT reaches RESET threshold,
CCT = Open15µs
ENABLE to RESET Minimum Timeout PeriodWhen EN goes high, CCT = open170µs
Delay Comparator Threshold
(Rising)1.1961.2301.264V
Delay Comparator Threshold
Hysteresis100mV
CT Charge Current124µA
CT Discharge Current5mA
MAX508745V, 400mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Electrical Characteristics (continued)
(VIN = VEN = 14V, CIN = 47μF (low ESR), COUT = 15μF, VOUT = 5V, SET = GND, TA = +25°C, unless otherwise speciied.)
NO-LOAD SUPPLY CURRENT
vs. TEMPERATURE
MAX5087 toc02
TEMPERATURE (°C)
IGND
(A)
VIN = +45V
VIN = +14V
VIN = +6.5V
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX5087 toc03
TEMPERATURE (°C)
ISHDN
(A)
OUTPUT VOLTAGE
vs. TEMPERATURE
MAX5087 toc04
TEMPERATURE (°C)
OUT
(V)
IOUT = 5mA
GROUND CURRENT
vs. TEMPERATURE (PULSED LOAD)
MAX5087 toc05
TEMPERATURE (°C)
IGND
(mA)
VIN = +6.5V
IOUT = 50mAIOUT = 100mA
IOUT = 400mA
OUTPUT VOLTAGE
vs. LOAD CURRENT AND TEMPERATURE
MAX5087 toc06
TEMPERATURE (°C)
OUT
(V)
VIN = +6.5V
IOUT = 100mA
IOUT = 50mA
IOUT = 400mA
DROPOUT VOLTAGE
vs. LOAD CURRENT
MAX5087 toc07
DROPOUT
(V)
VOUT = +5V
OUTPUT VOLTAGE vs.
INPUT VOLTAGE
MAX5087 toc01
VIN (V)
OUT
(V)152025303540510
IOUT = 0
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX5087 toc08
PSRR (dB)
COUT = 15F
IOUT = 10mA
LOAD-TRANSIENT RESPONSE
MAX5087 toc09
400s/div
VOUT
200mV/div
AC-COUPLED
IOUT
200mA/div
5mA
400mA
IOUT = 5mA
MAX508745V, 400mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Typical Operating Characteristics
(VIN = VEN = 14V, CIN = 47μF (low ESR), COUT = 15μF, VOUT = 5V, SET = GND, TA = +25°C, unless otherwise speciied.)
INPUT VOLTAGE STEP RESPONSE
MAX5087 toc10
400s/div
VOUT
AC-COUPLED
500mV/div
26V
6.5V
VIN
10V/div
IOUT = 50mA
STARTUP RESPONSE
MAX5087 toc11
400s/div
VOUT
2V/div
VIN
10V/div
IOUT = 5mA
ENABLE STARTUP RESPONSE
MAX5087 toc12
100s/div
1V/div
VOUT
2V/div
VIN = 14V
IOUT = 0
ENABLE STARTUP RESPONSE
MAX5087 toc13
100s/div
1V/div
VOUT
2V/div
VIN = 14V
IOUT = 400mA
ENABLE STARTUP RESPONSE
MAX5087 toc14
100s/div
1V/div
VOUT
2V/div
VIN = 45V
IOUT = 0
ENABLE STARTUP RESPONSE
MAX5087 toc15
100s/div
1V/div
VOUT
2V/div
VIN = 45V
IOUT = 400mA
SHUTDOWN RESPONSE
MAX5087 toc16
20ms/div
1V/div
VOUT
2V/div
IOUT = 5mA0V
GROUND CURRENT DISTRIBUTION
(TA = -40°C)
MAX5087 toc17
NUMBER OF UNITS64545556575860616259635253
150 UNITS
TESTED
GROUND CURRENT DISTRIBUTION
(TA = +125°C)
MAX5087 toc18
NUMBER OF UNITS757673636566686970677271
150 UNITS
TESTED
MAX508745V, 400mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Typical Operating Characteristics (continued)
PINNAMEFUNCTION
1, 12–16N.C.No Connection. Not internally connected.ENEnable Input. Drive EN high to turn on the regulator. Force EN low to place the device in shutdown mode.
3, 4INRegulator Input. Supply voltage ranges from 6.5V to 45V. Bypass IN to GND with a low-ESR 47µF
electrolytic capacitor.
5, 6OUTRegulator Output. Connect at least a 15µF low-ESR capacitor from OUT to GND.OUTSENSERegulator Output Feedback Point. OUTSENSE must be connected to OUT for ixed output voltage versions. Leave OUTSENSE open for adjustable output voltage version.GNDGroundSETFeedback Regulation Set Point. Connect SET to GND for a ixed 3.3V output (MAX5087A) or 5.0V output (MAX5087B). Connect an external resistive divider network from OUTSENSE to SET to GND to adjust the output voltage from 2.5V to 11V.RESETOpen-Drain Active-Low Reset Output. Connect a 10kΩ pullup resistor from RESET to any supply voltage up to 11V to create a logic output.CTReset Timeout Setting Connection. A 2µA charging current is available at CT. Connect a capacitor from CT to GND to set the reset timeout period (see the Adjustable Reset Timeout Period (CT) section).EPExposed Paddle. Connect externally to a large ground plane to aid heat dissipation. Do not use EP as a
ground connection.
MAX508745V, 400mA, Low-Quiescent-Current
Linear Regulator with Adjustable Reset Delay
Pin Description

Partno	Mfg	Dc	Qty	Available	Descript
MAX5087BATE+T \|MAX5087BATET	MAXIM	N/a	9006	avai	45V, 400mA, Low-Quiescent-Current Linear Regulator with Adjustable Reset Delay