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Part: MAX8864T
Category:
Power Management
-> Regulators
-> Linear Voltage Regulators
-> Fixed
Description: Low-Dropout, 120mA Linear Regulators
Company: Maxim Integrated Products
Datasheet: Download MAX8864T datasheet File size : 306 kB
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Datasheet text preview:
19-0466; Rev 2; 11/98
Low-Dropout, 120mA Linear Regulators
_______________General Description
The MAX8863T/S/R and MAX8864T/S/R low-dropout line a r regulators operate from a +2.5V to +6.5V input range and deliver up to 120mA. A PMOS pass transistor allows the low, 80µA supply current to remain indep e n d e n t of load, making these devices ideal for battery-operated portable equipment such as cellular phones, cordless phones, and modems. The devices feature Dual ModeTM operation: their output voltage is preset (at 3.15V for the T versions, 2.84V for the S versions, or 2.80V for the R versions) or can be adjusted with an external resistor divider. Other features include low-power shutdown, short-circuit protection, thermal shutdown protection, and reverse battery protection. The MAX8864 also includes an auto-discharge function, which actively discharges the output voltage to ground when the device is placed in shutdown mode. Both devices come in a miniature 5-pin SOT23-5 package.
____________________________Features
o Low Cost o Low, 55mV Dropout Voltage @ 50mA IOUT o Low, 68µA No-Load Supply Current Low, 80µA Operating Supply Current (even in dropout) o Low, 350µVRMS Output Noise o Miniature External Components o Thermal Overload Protection o Output Current Limit o Reverse Battery Protection o Dual ModeTM Operation: Fixed or Adjustable (1.25V to 6.5V) Output o Low-Power Shutdown
MAX8863T/S/R, MAX8864T/S/R
______________Ordering Information ________________________Applications
Cordless Telephones PCS Telephones Cellular Telephones PCMCIA Cards Modems Hand-Held Instruments Palmtop Computers Electronic Planners
PART TEMP. RANGE PINPACKAGE 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 SOT TOP MARK* AABE AABF AABV AABG AABH AABW
MAX8863TEUK-T -40°C to +85°C MAX8863SEUK-T -40°C to +85°C MAX8863REUK-T -40°C to +85°C MAX8864TEUK-T -40°C to +85°C MAX8864SEUK-T -40°C to +85°C MAX8864REUK-T -40°C to +85°C
*Alternate marking information: CY_ _ = MAX8863T, CZ_ _ = MAX8863S, DA_ _ = MAX8864T, DB_ _ = MAX8864S
__________Typical Operating Circuit
__________________Pin Configuration
TOP VIEW
SHDN 1 5 SET
IN
OUT
OUTPUT VOLTAGE COUT 1µF GND 2
BATTERY
CIN 1µF
MAX8863 MAX8864
SHDN GND SET
MAX8863 MAX8864
OUT
IN 3
4
SOT23-5
Dual Mode is a trademark of Maxim Integrated Products.
________________________________________________________________ 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 1-800-835-8769.
Low-Dropout, 120mA Linear Regulators MAX8863T/S/R, MAX8864T/S/R
ABSOLUTE MAXIMUM RATINGS
VIN to GND .........-7V to +7V Output Short-Circuit Duration ...........Infinite SET to GND .....-0.3V to +7V SHDN to GND.....-7V to +7V SHDN to IN ......-7V to +0.3V OUT to GND ......-0.3V to (VIN + 0.3V) Continuous Power Dissipation (TA = +70°C) SOT23-5 (derate 7.1mW/°C above +70°C) ........571mW Operating Temperature Range ...-40°C to +85°C Junction Temperature ......+150°C JA ......140°C/Watt Storage Temperature Range .....-65°C to +160°C Lead Temperature (soldering, 10sec) .....+300°C
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 = +3.6V, GND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Input Voltage (Note 2) Output Voltage Adjustable Output Voltage Range (Note 3) Maximum Output Current Current Limit (Note 4) Ground Pin Current Dropout Voltage (Note 5) Line Regulation Load Regulation Output Voltage Noise SHUTDOWN SHDN Input Threshold SHDN Input Bias Current Shutdown Supply Current Shutdown Discharge Resistance (MAX8864) VIH VIL ISHDN IQSHDN V SHDN = VIN VOUT = 0V TA = +25°C TA = TMAX TA = +25°C TA = TMAX 0 0.05 0.0001 0.02 300 1 2.0 0.4 100 V nA µA VLNR VLDR ILIM IQ SET = GND IOUT = 1mA IOUT = 50mA VIN = 2.5V to 6.5V, SET tied to OUT, IOUT = 1mA IOUT = 0mA to 50mA 10Hz to 1MHz SET = GND SET tied to OUT COUT = 1µF COUT = 100µF -0.15 ILOAD = 0mA ILOAD = 50mA SYMBOL VIN VOUT 0mA IOUT 50mA, SET = GND MAX886_T MAX886_S MAX886_R VOUT CONDITIONS MIN 2.5 3.05 2.75 2.70 VSET 120 280 68 80 1.1 55 0 0.011 0.006 350 220 120 0.15 0.040 150 3.15 2.84 2.80 TYP MAX 6.5 3.25 2.93 2.88 6.5 V mA mA µA mV %/V %/mA µVRMS V UNITS V
2
_______________________________________________________________________________________
Low-Dropout, 120mA Linear Regulators
ELECTRICAL CHARACTERISTICS (continued)
(VIN = +3.6V, GND = 0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SET INPUT SET Reference Voltage (Note 3) SET Input Leakage Current (Note 3) THERMAL PROTECTION Thermal Shutdown Temperature Thermal Shutdown Hysteresis TSHDN TSHDN 170 20 °C °C VSET ISET VIN = 2.5V to 6.5V, IOUT = 1mA VSET = 1.3V TA = +25°C TA = TMIN to TMAX TA = +25°C TA = TMAX 1.225 1.215 1.25 1.25 0.015 0.5 1.275 1.285 2.5 V nA SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX8863T/S/R, MAX8864T/S/R
Note 1: Limits are 100% production tested at TA = +25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical Quality Control (SQC) Methods. Note 2: Guaranteed by line regulation test. Note 3: Adjustable mode only. Note 4: Not tested. For design purposes, the current limit should be considered 120mA minimum to 420mA maximum. Note 5: The dropout voltage is defined as (VIN - VOUT) when VOUT is 100mV below the value of VOUT for VIN = VOUT +2V.
__________________________________________Typical Operating Characteristics
(VIN = +3.6V, CIN = 1µF, COUT = 1µF, TA = +25°C, MAX886_T, unless otherwise noted.)
OUTPUT VOLTAGE vs. LOAD CURRENT
MAX8863/4-01
SUPPLY CURRENT vs. LOAD CURRENT
MAX8863/4-02
OUTPUT VOLTAGE vs. INPUT VOLTAGE
MAX8863/4-03
3.30 3.25 OUTPUT VOLTAGE (V) 3.20 3.15 3.10 3.05 3.00 0
100 95 SUPPLY CURRENT (µA) 90
3.5 3.0 OUTPUT VOLTAGE (V) 2.5 2.0 NO LOAD 1.5 1.0 0.5 0
85 80 75 70 65 60 55 50
10 20 30 40 50 60 70 80 90 100 LOAD CURRENT (mA)
0
10 20 30 40 50 60 70 80 90 100 LOAD CURRENT (mA)
0
1
2
3
4
5
6
INPUT VOLTAGE (V)
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3
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