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Part: MAX8865S
Category:
Power Management
-> Regulators
-> Linear Voltage Regulators
-> Fixed
Description: Dual, Low-Dropout, 100mA Linear Regulators
Company: Maxim Integrated Products
Datasheet: Download MAX8865S datasheet File size : 306 kB
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Datasheet text preview:
19-0485; Rev 0; 4/96
Dual, Low-Dropout, 100mA Linear Regulators
_______________General Description
The MAX8865 and MAX8866 dual, low-dropout linear regulators operate from a +2.5V to +5.5V input range a n d deliver up to 100mA. At 200mA total load, the P M O S pass transistors keep the supply current at 145µA, 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 voltages are 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 external resistor dividers. Other f e a t u r e s include independent low-power shutdown, short-circuit protection, thermal shutdown protection, a n d reverse battery protection. The MAX8866 also includes an auto-discharge function, which actively discharges the selected output voltage to ground when the device is placed in shutdown mode. Both devices come in a miniature 8-pin µMAX package.
____________________________Features
o Low Cost o Low, 55mV Dropout Voltage @ 50mA IOUT o Low, 105µA No-Load Supply Current o Low, 145µA Operating Supply Current (even in dropout) o Low, 350µVRMS Output Noise o Independent, Low-Current Shutdown Control o Thermal Overload Protection o Output Current Limit o Reverse Battery Protection o Dual Mode Operation: Fixed or Adjustable (1.25V to 5.5V) Outputs
MAX8865T/S/R, MAX8866T/S/R
______________Ordering Information ________________________Applications
Cordless Telephones PCS Telephones Cellular Telephones PCMCIA Cards Modems Hand-Held Instruments Palmtop Computers Electronic Planners
PART MAX8865TEUA MAX8865SEUA MAX8865REUA MAX8866TEUA MAX8866SEUA MAX8866REUA TEMP. RANGE -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C PINPACKAGE 8 µMAX 8 µMAX 8 µMAX 8 µMAX 8 µMAX 8 µMAX PRESET VOUT (V) 3.15 2.84 2.80 3.15 2.84 2.80
__________Typical Operating Circuit
__________________Pin Configuration
TOP VIEW
OUT1 IN OUT2
V OUTPUT OLTAGE 1 V OUTPUT OLTAGE 2 1 COUT1 µF 1 OUT2 C µF
C 2 IN µF BATTERY
MAX8865 AX8866
SHDN1 SHDN2 GND SET1 SET2
OUT1 1 IN 2 GND 3 OUT2 4
8
SET1 SHDN1 SHDN2 SET2
MAX8865 AX8866
µMAX
7 6 5
SHDN2
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
Dual, Low-Dropout, 100mA Linear Regulators MAX8865T/S/R, MAX8866T/S/R
ABSOLUTE MAXIMUM RATINGS
VIN to GND .........-6V to +6V Output Short-Circuit Duration ...........Infinite SET_ to GND ...-0.3V to +6V SHDN_ to GND ...-6V to +6V _ SHDN_ to IN ....-6V to +0.3V _ OUT_ to GND.....-0.3V to (VIN + 0.3V) Continuous Power Dissipation (TA = +70°C) µMAX (derate 4.1mW/°C above +70°C)....330mW Operating Temperature Range ...-40°C to +85°C Junction Temperature ......+150°C Thermal Resistance (JA) .....244°C/W 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 = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) PARAMETER Input Voltage (Note 1) Output Voltage Adjustable Output Voltage Range (Note 2) Maximum Output Current Current Limit (Note 3) Ground Pin Current Dropout Voltage (Note 4) Line Regulation Load Regulation Output Voltage Noise SHUTDOWN SHDN Input Threshold SHDN Input Bias Current Shutdown Supply Current Shutdown to Output Discharge Delay (MAX8866) SET INPUT SET Reference Voltage (Note 2) SET Input Leakage Current (Note 2) THERMAL PROTECTION Thermal Shutdown Temperature Thermal Shutdown Hysteresis 2 VSET_ ISET_ VIH VIL I SHDN_ _ IQ SHDN V SHDN_ = VIN _ VOUT_ = 0V COUT = 1µF, no load 0 0.16 1 2.0 0.4 1000 3000 V nA nA ms VLNR VLDR SYMBOL VIN VOUT_ 0mA IOUT 50mA, SET_ = GND MAX886_T MAX886_S MAX886_R CONDITIONS MIN 2.5 3.08 2.77 2.73 VSET_ 100 ILIM IQ SET_ = GND IOUT = 1mA IOUT = 50mA VIN = 2.5V to 5.5V, SET_ tied to OUT_, IOUT_ = 1mA IOUT_ = 0mA to 50mA 10Hz to 1MHz SET_ = GND SET_ tied to OUT_ COUT = 1µF COUT = 100µF -0.10 IOUT_ = 0mA IOUT_ = 50mA 220 105 145 1.1 55 0 0.012 0.006 350 220 270 TYP 3.15 2.84 2.80 MAX 5.5 3.24 2.91 2.87 5.5 UNITS V V
VOUT_
V mA mA µA mV %/V %/mA µVRMS
120 0.10 0.03
VIN = 2.5V to 5.5V, IOUT_ = 1mA VSET_ = 1.3V
1.222
1.25 0.015
1.276 50
V nA
TSHDN TSHDN
170 20
°C °C
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Dual, Low-Dropout, 100mA Linear Regulators
ELECTRICAL CHARACTERISTICS
(VIN = +3.6V, GND = 0V, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 5) PARAMETER Input Voltage (Note 1) Output Voltage Adjustable Output Voltage Range (Note 2) Maximum Output Current Current Limit (Note 3) Ground Pin Current Dropout Voltage (Note 4) Line Regulation Load Regulation Output Voltage Noise SHUTDOWN SHDN Input Threshold SHDN Input Bias Current Shutdown Supply Current Shutdown to Output Discharge Delay (MAX8866) SET INPUT SET Reference Voltage (Note 2) SET Input Leakage Current (Note 2) THERMAL PROTECTION Thermal Shutdown Temperature Thermal Shutdown Hysteresis Note 1: Note 2: Note 3: Note 4: Note 5: TSHDN TSHDN 170 20 °C °C VSET_ ISET_ VIN = 2.5V to 5.5V, IOUT_ = 1mA VSET_ = 1.3V 1.207 1.25 0.015 1.288 50 V nA VIH VIL I SHDN_ _ IQ SHDN V SHDN_ = VIN _ VOUT_ = 0V COUT = 1µF 0 0.16 1 2.0 0.4 1000 3000 V nA nA ms VLNR VLDR ILIM IQ SET_ = GND IOUT = 1mA IOUT = 50mA VIN = 2.5V to 5.5V, SET_ tied to OUT_, IOUT_ = 1mA IOUT_ = 0mA to 50mA 10Hz to 1MHz SET_ = GND SET_ tied to OUT_ COUT = 1µF COUT = 100µF -0.11 IOUT_ = 0mA IOUT_ = 50mA SYMBOL VIN VOUT_ 0mA IOUT 50mA, SET_ = GND MAX886_T MAX886_S MAX886_R VOUT_ CONDITIONS MIN 2.5 3.05 2.74 2.70 VSET_ 80 220 105 145 1.1 55 0 0.012 0.006 350 220 120 0.11 0.03 270 3.15 2.84 2.80 TYP MAX 5.5 3.26 2.93 2.89 5.5 V mA mA µA mV %/V %/mA µVRMS V UNITS V
MAX8865T/S/R, MAX8866T/S/R
Guaranteed by line regulation test. Adjustable mode only. Not tested. For design purposes, the current limit should be considered 120mA minimum to 320mA maximum. The dropout voltage is defined as (VIN_ - VOUT_) when VOUT_ is 100mV below the value of VOUT_ for VIN_ = VOUT_ +2V. Specifications to -40°C are guaranteed by design and not production tested.
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