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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1615 Datasheet

High-Voltage / Low-Power Linear Regulators for Notebook Computers

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MAX1615 pdf
19-1225; Rev 2; 1/98
High-Voltage, Low-Power Linear Regulators
for Notebook Computers
________________General Description
The MAX1615/MAX1616 are micropower, SOT23-5 lin-
ear regulators that supply always-on, keep-alive power
to CMOS RAM and microcontrollers (µCs) in systems
with high-voltage batteries. Key features include wide
input voltage range, low dropout voltage, and low qui-
escent supply current.
Despite a miserly 8µA (max) no-load supply current, the
MAX1615/MAX1616 have excellent line-transient
response and AC power-supply rejection ratio. They
provide a clean, fixed 5V or 3.3V output (MAX1615) or
an adjustable 1.24V to 28V output (MAX1616), even
when subjected to fast supply-voltage changes that
occur during the switchover from battery to AC adapter
input power. The space-saving SOT23-5 package has
excellent thermal characteristics and tolerates up to
571mW of power dissipation. Fault protection is provid-
ed by internal foldback current limiting and thermal-
shutdown circuitry.
________________________Applications
CMOS/RTC Backup Power
Microcontroller Power
Notebook Computers
Smart-Battery Packs
PDAs and Handy-Terminals
Battery-Powered Systems
____________Typical Operating Circuit
____________________________Features
o 4V to 28V Input Range
o 8µA (max) Quiescent Supply Current
o <1µA Shutdown Supply Current
o 3.3V or 5V, Pin-Selectable Output (MAX1615)
Adjustable 1.24V to 28V Output (MAX1616)
o 30mA Output Current
o ±2% Initial Output Accuracy
o Thermal-Overload Protection
o 5-Pin SOT23 Package
o Low Cost
_______________Ordering Information
PART
TEMP. RANGE
MAX1615EUK-T -40°C to +85°C
MAX1616EUK-T -40°C to +85°C
PIN-
SOT
PACKAGE TOP MARK
5 SOT23-5 ABZD
5 SOT23-5 ABZE
___________________Pin Configuration
BATTERY
CIN
0.1µF
IN OUT
MAX1615
SHDN
GND
5/3
OUTPUT
VOLTAGE
COUT
4.7µF
TOP VIEW
IN 1
5 SHDN
MAX1615
GND 2 MAX1616
OUT 3
4 5/3 (FB)
SOT23-5
( ) ARE FOR MAX1616.
________________________________________________________________ Maxim Integrated Products 1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
For small orders, phone 408-737-7600 ext. 3468.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX1615 Datasheet

High-Voltage / Low-Power Linear Regulators for Notebook Computers

No Preview Available !

MAX1615 pdf
High-Voltage, Low-Power Linear Regulators
for Notebook Computers
ABSOLUTE MAXIMUM RATINGS
IN to GND .................................................................-0.3V to 30V
Terminal Voltages to GND
SHDN to GND ...........................................-0.3V to (VIN + 0.3V)
5/3 to GND ............................................-0.3V to (VOUT + 0.3V)
FB (MAX1616) to GND .........................-0.3V to (VOUT + 0.3V)
OUT to GND...........................................................-0.3V to 30V
OUT Short-Circuit to GND ...............................................30sec
Continuous OUT Current.....................................................40mA
Continuous Power Dissipation (TA = +70°C) (Note 1)
SOT23-5 (derate 7.1mW/°C above +70°C)...................571mW
Operating Temperature Range
MAX161_EUK-T ...............................................-40°C to +85°C
Storage Temperature Range .............................-65°C to +160°C
Lead Temperature (soldering, 10sec) .............................+300°C
Note 1: See Operating Region and Power Dissipation section.
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.
ELECTRICAL CHARACTERISTICS
(VIN = 15V, SHDN = VIN, ILOAD = 5µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2)
PARAMETER
Input Voltage Range
Supply Current
Minimum Load Current
SYMBOL
VIN
IIN
CONDITIONS
SHDN = IN, TA = +25°C
SHDN = IN, VIN = 6V to 28V, TA = TMIN to TMAX
MIN TYP MAX UNITS
4 28 V
6.2 8
µA
15
5 µA
Shutdown Supply Current
IIN
SHDN = GND
(shutdown mode)
TA = +25°C
TMIN = TMIN to TMAX
1.5
µA
3
Dropout Supply Current
Output set to 5V,
VIN = 4V
TA = +25°C
70 µA
Output Voltage (MAX1615)
(Note 3)
FB Threshold (MAX1616)
(Note 3)
VFBT
FB Input Current (MAX1616)
Dropout Voltage
Output Current Limit
OUT Reverse Leakage
Current
IFB
VDO
ILOAD = 1mA,
TA = +25°C,
VIN = 6V to 28V
ILOAD = 5µA to 30mA,
TA = TMIN to TMAX,
VIN = 6V to 28V
FB = OUT,
VIN = 6V to 28V
VFB = 1.3V
ILOAD = 30mA (Note 4)
VIN = 6V
5/3 = GND
5/3 = OUT
5/3 = GND
5/3 = OUT
TA = +25°C,
ILOAD = 1mA
TA = TMIN to TMAX,
ILOAD = 5µA to 30mA
IN = unconnected, VOUT forced to 5V
3.26 3.33 3.40
4.95 5.05 5.15
3.15 3.48
4.75 5.25
1.215 1.240 1.265
1.18 1.28
-10 12
30
350
100
70
V
V
V
nA
mV
mA
µA
Capacitive Load
Requirements (Note 5)
MAX1615
MAX1616
0.16
µF/mA
0.23
Start-Up Time Response
Rising edge of IN or SHDN to OUT within specifi-
cation limits, RL = 500, COUT = 6.8µF,
VOUT set to 5V
1 ms
Start-Up Overshoot
VOSH
RL = 500, COUT = 10µF within 90% of nominal
output voltage
0.5 %VOUT
2 _______________________________________________________________________________________


Part Number MAX1615
Description High-Voltage / Low-Power Linear Regulators for Notebook Computers
Maker Maxim
Total Page 8 Pages
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