MAX8719ETA+-MAX8719ETA+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX8719ETA+T ,High-Voltage, Low-Power Linear Regulators for Notebook ComputersELECTRICAL CHARACTERISTICS(Circuit of Figure 1. V = 15V, I = 5μA, T = 0°C to +85°C. Typical values ..
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MAX8719ETA+-MAX8719ETA+T
High-Voltage, Low-Power Linear Regulators for Notebook Computers
neral DescriptionThe MAX8718/MAX8719 are micropower, 8-pin TDFN
linear regulators that supply always-on, keep-alive
power to CMOS RAM, real-time clocks (RTC), and
microcontrollers in systems with high-voltage batteries.
The circuits consist of a 100mA linear regulator and a
power-good comparator (PGOOD) with fixed-output
delay. Key features include wide input voltage range,
low-dropout voltage, and low-quiescent supply current.
Despite a miserly 25μA (max) no-load quiescent cur-
rent, the MAX8718/MAX8719 have good line- and load-
transient response and excellent AC power-supply
rejection. They provide a clean fixed 5V or 3.3V output
(MAX8718), or an adjustable 1.24V to 28V output
(MAX8719), even when subjected to fast supply-volt-
age changes that occur during the switchover from bat-
tery to AC-adapter input power. The space-saving
TDFN package has excellent thermal characteristics
and tolerates up to 1951mW of power dissipation.
Internal foldback current limiting and thermal shutdown
protect the regulator from overload and thermal faults.
In addition to the main notebook-computer application,
these devices are useful in other low-power, high-volt-
age applications (4V < VIN< 28V) such as smart batter-
ies, current control loops, telecom emergency power,
and housekeeping power for off-line supplies.
The MAX8718/MAX8719 are available in a thermally
enhanced 3mm x 3mm, 8-lead TDFN package.
Applications
CMOS/RTC Backup Power
Microcontroller Power
Notebook Computers
Smart-Battery Packs
PDAs and Handy-Terminals
Battery-Powered Systems
Features4V to 28V Input Range18μA Quiescent Supply Current<3μA Shutdown Supply Current100mA Output Current3.3V or 5V, Pin-Selectable Output (MAX8718)Adjustable 1.24V to 28V Output (MAX8719)±2% Output AccuracyThermal-Overload ProtectionDelayed Power-Good OutputThermally Enhanced 8-Pin TDFN Packageigh-Voltage, Low-Power Linear Regulators forotebook Computers
TDFN
3mm × 3mm
TOP VIEW
SHDN
PGOODVCC
OUT
I.C.GND
5/3 (FB)
MAX8718
MAX8719
() ARE FOR THE MAX8719.
Pin Configuration
Ordering Information
19-3495; Rev 0; 11/04
PARTTEMP RANGEPIN-PACKAGEOUTPUT
VOLTAGE
MAX8718ETA-40°C to +85°C8 TDFN 3mm x
3mm3.3V/5V
MAX8719ETA-40°C to +85°C8 TDFN 3mm x
3mmAdjustable
igh-Voltage, Low-Power Linear Regulators forotebook ComputersABSOLUTE 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.
IN to GND...............................................................-0.3V to +30V
SHDNto GND..............................................-0.3V to (VIN + 0.3V)
5/3(MAX8718) to GND.............................................-0.3V to +6V
FB (MAX8719) to GND.............................................-0.3V to +6V
OUT (MAX8718) to GND..........................................-0.3V to +6V
OUT (MAX8719) to GND........................................-0.3V to +30V
VCCto GND (MAX8718)...........................................-0.3V to +6V
VCCto GND (MAX8719)........................................-0.3V to +2.7V
PGOOD to GND.....................................................-0.3V to +30V
I.C. to GND...............................................................-0.3V to +6V
OUT Short Circuit to GND.......................................................30s
Continuous Power Dissipation (TA= +70°C)
8-Pin TDFN (derate 24.4mW/°C above +70°C)..........1951mW
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
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1. VIN= 15V, IOUT= 5μA, TA= 0°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Input Voltage RangeVIN428V
SHDN = IN, TA = +25°C1218μsSupply Current (MAX8718)IINSHDN = IN, VIN = 6V to 28V25μA
0V < VCC < 2.7V, TA = +25°C-0.1+0.1VCC Input Current (MAX8719)0V < VCC < 2.7V, TA = 0°C to +85°C0.04μA
0V < VCC < 5.5V, TA = +25°C3.4VCC Input Current (MAX8718)0V < VCC < 5.5V, TA = 0°C to +85°C2.3μA
OUT Minimum Load Current5μA
Shutdown Supply CurrentSHDN = 0V1.23μA
Dropout Supply CurrentVOUT set to 5V, VIN = 4.7V85μA
VIN = 6V to 28V, ILOAD = 1mA, 5/3 = GND,
TA = +25°C3.263.333.40
VIN = 6V to 28V, ILOAD = 1mA, 5/3 = OUT,
TA = +25°C4.955.055.15
VIN = 6V to 28V, ILOAD = 5μA to 100mA,
5/3 = GND3.153.48
OUT Output Voltage (MAX8718)
VIN = 6V to 28V, ILOAD = 5μA to 100mA,
5/3 = OUT4.755.25
FB = OUT, VIN = 6V to 28V, ILOAD = 1mA1.2151.2401.265
FB Threshold (MAX8719)VFBFB = OUT, VIN = 6V to 28V,
ILOAD = 5μA to 100mA (Note 2)1.181.28V
VFB = 1.3V, TA = +25°C-30+30FB Input Current (MAX8719)IFBVFB = 1.3V, TA = 0°C to +85°C15nA
V5/3 = 5V, TA = +25°C-30+305/3 Input Current (MAX8718)I5/3V5/3 = 5V, TA = 0°C to +85°C2nA
Dropout VoltageVDROPOUTILOAD = 100mA (Note 3)560mV
igh-Voltage, Low-Power Linear Regulators forotebook ComputersELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1. VIN= 15V, IOUT= 5μA, TA= 0°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
VIN = 6V, TA = +25°C210Output Current LimitILIMVOUT = 0, VIN = 6V125340mA
Output Reverse Leakage CurrentVOUT forced to 5.5V, IN = unconnected70μA
MAX87180.16Capacitive Load RequirementsMAX87190.23μF/mA
Startup Time Response
Rising edge of IN or SHDN to OUT within
spec limits, COUT = 10μF, RLOAD = 500Ω,
VOUT = 5Vms
Startup Output OvershootCOUT = 10μF, RLOAD = 500Ω, OUT within
90% of the nominal output voltage0.5%
TA = +25°C, rising edge only0.88 ×
VOUT
0.9 ×
VOUT
0.92 ×
VOUT
VCC Threshold (MAX8718)
0°C < TA < +85°C, rising edge only0.85 ×
VOUT
0.9 ×
VOUT
0.95 ×
VOUT
TA = +25°C, rising edge only0.88 ×
VFB
0.9 ×
VFB
0.92 ×
VFB
VCC Threshold (MAX8719)
0°C < TA < +85°C, rising edge only0.85 ×
VFB
0.9 ×
VFB
0.95 ×
VFB
VCC to PGOOD DelayVTH to (VTH - 100mV)4.5μs
PGOOD Active-Timeout Period100185300ms
PGOOD Output Leakage CurrentPGOOD = 5.5V, VCC = 5.5V0.1μA
PGOOD Output Low VoltageISINK = 1.6mA, VCC = GND0.3V
VCC Input Hysteresis2%
Thermal-Shutdown ThresholdV SHDN = 0 or 15V, 20°C hysteresis+165°C
SHDN Input Low Voltage0.25V
SHDN Input High Voltage1.4V
SHDN Input Bias CurrentV SHDN = 0 or 15V, TA = 0°C to +85°C-1+0.1+1μA
igh-Voltage, Low-Power Linear Regulators forotebook ComputersELECTRICAL CHARACTERISTICS
(Circuit of Figure 1 VIN= 15V, IOUT= 5μA, TA= -40°C to +85°C, unless otherwise noted.) (Note 4)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Input Voltage RangeVIN428V
Supply Current (MAX8718)IINSHDN = IN, VIN = 6V to 28V25μA
Supply Current (MAX8719)IINSHDN = IN, VIN = 6V to 28V25μA
OUT Minimum Load Current5μA
Shutdown Supply CurrentSHDN = 0V3μA
VIN = 6V to 28V, ILOAD = 5μA to 100mA,
5/3 = GND3.103.48
OUT Output Voltage (MAX8718)
VIN = 6V to 28V, ILOAD = 5μA to 100mA,
5/3 = OUT4.725.25
FB = OUT, VIN = 6V to 28V, ILOAD = 1mA1.2151.265
FB Threshold (MAX8719)VFBFB = OUT, VIN = 6V to 28V,
ILOAD = 5μA to 100mA (Note 2)1.181.28V
FB Input Current (MAX8719)IFBVFB = 1.3V-40+40nA
5/3 Input Current (MAX8718)I5/3V5/3 = 5V-30+30nA
Dropout VoltageVDROPOUTILOAD = 100mA (Note 3)560mV
Output Current LimitILIMVOUT = 0, VIN = 6V125375mA
MAX87180.16Capacitive Load RequirementsMAX87190.23μF/mA
Startup Time Response
Rising edge of IN or SHDN to OUT within
spec limits, COUT = 10μF, RLOAD = 500Ω,
VOUT = 5Vms
VCC Threshold (MAX8718)-40°C < TA < +85°C, rising edge only0.85 ×
VOUT
0.95 ×
VOUTV
VCC Threshold (MAX8719)-40°C < TA < +85°C, rising edge only0.85 ×
VFB
0.95 ×
VFBV
PGOOD Active-Timeout Period100300ms
PGOOD Output Low VoltageISINK = 1.6mA, VCC = GND0.3V
SHDN Input Low Voltage0.25V
SHDN Input High Voltage1.4V
SHDN Input Bias CurrentV SHDN = 0 or 15V, TA = -40°C to +85°C-1+1μA
Note 1:Limits are 100% production tested at TA= +25°C. Limits over the operating temperature range are guaranteed through cor-
relation using standard quality control (SQC) methods.
Note 2:Pulse test at VIN= 28V, IOUT= 100mA to avoid exceeding package power-dissipation limits.
Note 3:Dropout voltage is tested by reducing the input voltage until VOUTdrops to 100mV below its nominal value as measured
with VINstarting 2V above VOUT.
Note 4:Specifications to -40°C are guaranteed by design, not production tested.
igh-Voltage, Low-Power Linear Regulators forotebook ComputersSAFE LOAD-CURRENT OPERATING AREA
vs. SUPPLY VOLTAGE
AX8718/19 toc01
SUPPLY VOLTAGE (V)
(m
POWER-DISSIPATION
LIMIT REGION
GROUND CURRENT vs. SUPPLY VOLTAGE
AT VARIOUS LOADS
X8718/19 toc02
SUPPLY VOLTAGE (V)
(m
150mA
110mA
70mA
30mA10mA1015202530
SUPPLY CURRENT vs. SUPPLY VOLTAGE
8718/9 toc03
SUPPLY VOLTAGE (V)
(μ
TA = -40°C
TA = +25°C
TA = +85°C
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
AX8718/19 toc04
SUPPLY VOLTAGE (V)
(μ
TA = +25°C
SUPPLY CURRENT vs. TEMPERATURE
AX8718/9 toc05
TEMPERATURE (°C)
(μ
VIN = 15V
RIPPLE REJECTION vs. FREQUENCY
AX8718/19 toc06
FREQUENCY (kHz)
(d
10mA LOAD CURRENT
LOAD-TRANSIENT RESPONSE
MAX8718/9 toc07
200μs/div
VOUT
100mV/div
IOUT
100mA/div
LINE-TRANSIENT RESPONSE
MAX8718/9 toc08
100μs/div
VOUT
200mV/div
AC-COUPLED
VIN
+20V
+10V
CIN = 10μF, COUT = 10μF
Typical Operating Characteristics
(Circuit of Figure 1. VIN= 15V, VOUT= 3.3V, TA= +25°C, unless otherwise noted.)
igh-Voltage, Low-Power Linear Regulators forotebook ComputersPGOOD ACTIVE-TIMEOUT PERIOD
vs. TEMPERATURE
8718/9 toc13
TEMPERATURE (°C)
(m
Typical Operating Characteristics (continued)
(Circuit of Figure 1. VIN= 15V, VOUT= 3.3V, TA= +25°C, unless otherwise noted.)
TIME TO EXIT SHUTDOWN
MAX8718/9 toc09
100μs/div
VOUT
+5V
VIN = 15V
SHDN
5V/div
DROPOUT SUPPLY CURRENT
vs. SUPPLY VOLTAGE
X8718/19 toc10
SUPPLY VOLTAGE (V)
(μTA = +85°C
TA = +25°C
TA = -40°C
DROPOUT VOLTAGE vs. LOAD CURRENT
X8718/9 toc11
LOAD CURRENT (mA)
(m
PGOOD TRANSIENT RESPONSE
MAX8718/9 toc12
40ms/div
VCC
PGOOD
+5V
+5V

Partno	Mfg	Dc	Qty	Available	Descript
MAX8719ETA+	MAXIM	N/a	745	avai	High-Voltage, Low-Power Linear Regulators for Notebook Computers
MAX8719ETA+T	MAXIM	N/a	100000	avai	High-Voltage, Low-Power Linear Regulators for Notebook Computers