DESCRIPTION
FEATURES
■Low Noise Output LDO: 40µV RMS Possible ■1% Initial Accuracy
■Very Low Quiecent Current: 70µA
■Low Dropout Voltage (210mV at 150mA)■Current and Thermal Limiting ■Reverse-Battery Protection
手摇三轮车
■Wide Range of Fix Output Voltages:1.2V, 1.5V,1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V and 5.0V ■Zero Off-Mode Current ■Small 5-Pin SOT-23
■Pin Compatible to MIC5205/MAX8877
(fixed Options Only) and AS3815
The SPX5205 is a positive voltage regulator with very low dropout voltage, output noise and ground current (750µA at 100mA). V OUT has a tolerance of less than 1% and is temperature compensated. Fixed output voltages 1.2V, 1.5V, 1.8V, 2.0V, 2.5V, 2.8V, 3.0V, 3.3V, and 5.0V and an adjustable version are available in a small 5-pin SOT-23 package. Other key features include zero off-mode current, reverse battery protection, thermal shutdown and current limit. The SPX5205 is an excellent choice for use in battery-powered applications, and where powe r conservation is desired such as: cellular/ cordless telephones, radio
control systems, and portable computers.
APPLICATIONS
■PDA
■Battery Powered Systems ■Cellular Phone
■Cordless Telephones ■Radio Control Systems
■
Laptop, Palmtop, and Notebook Computers
TYPICAL APPLICATION CIRCUIT红兵打针
■Portable Consumer Equipment ■Portable Instrumentation ■Bar Code Scanners ■
SMPS Post-Regulator
Internally Limited
Lead Temperature (Soldering, 5 seconds).................................................260°C
Operating Junction -40°C to +125°C
ELECTRICAL CHARACTERISTICS T J=25°C, V IN = V OUT + 1V, I L = 100µA, C L = 1µF, and V ENABLE≥ 2.4V. The ♦denotes the specifications which apply over full temperature range -40°C to +85°C, unless otherwise specified.
PARAMETER MIN TYP MAX UNITS CONDITIONS
Output Voltage Tolerance (V OUT)-1+1%V NOM
-2+2♦
Output Voltage Temperature Coefficient57ppm/°C♦
Line Regulation0.030.1%/V V IN = V OUT + 1V to 16V
0.2♦
Load Regulation0.10.2%I L = 0.1mA to 150mA
0.5♦
Dropout Voltage (See Note 2)3050mV I L = 100µA
(V IN - V O)70♦
140190mV I L = 50mA
230♦
180250mV I L = 100mA
300♦
210275mV I L = 150mA
350♦
卫生棉条
自动拔除器
Quiescent Current (I GND)0.051µA V ENABLE≤ 0.4V
5♦V ENABLE≤ 0.25V
Ground Pin Current70125µA I L = 100µA
(I GND)150♦
350600I L = 50mA
800♦
7501000I L = 100mA
1500♦
13001900I L = 150mA
2500♦
Ripple Rejection (PSRR)70dB
Current Limit (I LIMIT)360500mA V OUT = 0V
Output Noise (e NO)300µV RMS I L = 10mA, C L = 1µF, C IN= 1µF
(10Hz - 100kHz.)
40µV RMS I L = 10mA, C L = 10µF, C BYP =
笔顺
编号1µF,C IN=1µF,(10Hz - 100kHz)
Input Voltage Level0.4V OFF
Logic Low (V IL)
Input Voltage Level 2.0ON
Logic High (V
IL
)
ENABLE Input Current0.012µA V
IL ≤ 0.4V
320V
IH ≥ 2.0V
ABSOLUTE MAXIMUM RATINGS
Input -20V to +20V
Enable -20V to +20V +2.5V to 16V
Operating Junction -40°C to +125°C
Enable 0V to V IN
SOT-23-5 (θJA)...................................................................................See Note 1
RECOMMENDED OPERATING CONDITIONS
Note 1: The maximum allowable power dissipation is a function of maximum operating junction temperature, T J (max), the junction to ambient thermal resistance, and the ambient, θJ A, and the ambient temperature T A. The maximum allowable power dissipation at any ambient temperature is given: P D (max) = (T J (max) - T A)/θJ A, exceeding the maximum allowable power limit will result in excessive die temperature; thus, the
regulator will go into thermal shutdown. The θJ A of the SPX5205 is 220°C/W mounted on a PC board.
Note 2: Not applicable to output voltages of less than 2V.
TYPICAL PERFORMANCE CHARACTERISTICS
Ground Current vs Load Current
Ground Current vs Load Current in Dropout
Dropout Voltage vs Load Current
Ground Current vs Temperature at I
LOAD =100µA
TYPICAL PERFORMANCE CHARACTERISTICS
TYPICAL PERFORMANCE CHARACTERISTICS
Ground Current in Dropout vs Temperature
ENABLE Voltage, ON threshold vs Input Voltage
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