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Part: LP2985-XXD
Category:
Description: LP2985-XX; Micropower 150 ma Low Noise, Low Dropout Linear Regulator
Company: Philips Semiconductors
Datasheet: Download LP2985-XXD datasheet File size : 606 kB
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Datasheet text preview:
INTEGRATED CIRCUITS
LP2985-XX Micropower 150 mA low noise, low dropout linear regulator
Product data File under Integrated Circuits, Standard Analog 2001 Oct 03
Philips Semiconductors
Philips Semiconductors
Product data
Micropower 150 mA low noise, low dropout linear regulator
LP2985-XX
GENERAL DESCRIPTION
The LP2985-XX is a 150 mA, fixed output voltage regulator designed to provide very low dropout and low noise in battery powered and portable applications. The output voltage is preset to 1.8, 2.8, 3.0, 3.3, 3.6, or 5.0 V. Designed with an optimized PNP process, the LP2985-XX achieves unequalled performance in all specifications critical to battery-powered designs such as low supply-current, low dropout voltage, low power consumption, small size, fast dynamic response to line and load, precision output, etc. This regulator consists of an internal voltage reference, an error amplifier, a driver with current limiter and a thermal shut-down mechanism. The LP2985-XX is housed in a SOT23-5 5-lead package.
FEATURES
· Very low consumption current: 85 mA typ. (when not loaded),
0.1 mA max. (when off)
APPLICATIONS
· Very low dropout voltage: 100 mV typ. (IOUT = 50 mA) · High precision output voltage: ±2% · Output current capacity: 150 mA · Low noise: 30 mVRMS @ 20 Hz to 80 kHz (Cn= 10 nF) · Good line regulation: 0.01%/V typ. · Good load regulation: 30 mV typ. (IOUT = 1 to 150 mA) · Low temperature drift co-efficient to VOUT: ±100 ppm/°C · Built-in current limit and thermal shut-down · Wide operating temperature range: 30 to +85 °C · Preset output voltages: 1.8, 2.8, 3.0, 3.3, 3.6, or 5.0 V
SIMPLIFIED DEVICE DIAGRAM
LP2985-XX
VIN 1
· Cellular phones, cordless phones, and 2-way radios · Electronic notebooks, PDAs and palmtop computers · Cameras, VCRs and camcorders · PCMCIA cards · Modems · Battery-powered or hand-held instruments
5
VOUT
3 ON/OFF
BIAS
CURRENT LIMIT DRIVER
REFERENCE NOISE 4
THERMAL SHUTDOWN GND 2
SL01545
Figure 1. Simplified device diagram.
2001 Oct 03
2
8532291 27197
Philips Semiconductors
Product data
Micropower 150 mA low noise, low dropout linear regulator
LP2985-XX
ORDERING INFORMATION
PACKAGE TYPE NUMBER NUMBER LP2985-XXD NAME SOT23-5, SOT25, SO5 DESCRIPTION plastic small outline package; 5 leads (see dimensional drawing) TEMPERATURE RANGE 30 to +85 °C
NOTE: The device has five voltage output options, indicated by the XX on the Type Number. XX 18 28 30 33 36 50 VOLTAGE (Typical) 1.8 V 2.8 V 3.0 V 3.3 V 3.6 V 5.0 V
Part number marking
Each device is marked with a four letter code. The first three letters designate the product. The fourth letter, represented by `x', is a date tracking code. Part number LP2985-18D LP2985-28D LP2985-30D LP2985-33D LP2985-36D LP2985-50D Marking AABx AACx ABGx ABHx ANBx ABJx
PIN CONFIGURATION
PIN DESCRIPTION
PIN SYMBOL VIN GND ON/OFF NOISE VOUT Voltage input. Device ground. ON/OFF control pin. Connect to VIN if not used. Noise decrease pin, for connecting external capacitor. Voltage output. DESCRIPTION 1 2 3 4
4 NOISE
GND
2
ON/OFF
3
LP2985-XX
VIN
1
5
VOUT
5
SL01544
Figure 2. Pin configuration.
MAXIMUM RATINGS
SYMBOL VIN Toper Tstg PD Supply voltage Operating temperature Storage temperature Power dissipation PARAMETER MIN. 0.3 30 40 MAX. +12.0 +85 +150 150 UNIT V °C °C mW
2001 Oct 03
3
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