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REG103, REG103AU, REG103ESO

Table of contents:
Info of REG103
Info of REG103AU
Info of REG103ESO

REG103, REG103AU, REG103ESO Selling Leads, Datasheet

MFG:BB Package Cooled:SOP-8 D/C:08+

REG103, REG103AU, REG103ESO Datasheet download

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Part Number: REG103

MFG: BB

Package Cooled: SOP-8

D/C: 08+

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REG103 General Description

The REG103 is a family of low-noise, low-dropout, linear regulators with low ground pin current. Its new DMOS topology provides significant improvement over previous designs, including low-dropout voltage (only 115mV typ at full load), and better transient performance. In addition, no output capacitor is required for stability, unlike conventional low-dropout regulators that are difficult to compensate and require expensive low ESR capacitors greater than 1F.

Typical ground pin current is only 1mA (at IOUT = 500mA) and drops to 0.5A in not enabled mode. Unlike regulators with PNP pass devices, quiescent current remains relatively constant over load variations and under dropout conditions.

The REG103 has very low output noise (typically 33Vrms for VOUT = 3.3V with CNR = 0.01F), making it ideal for use in portable communications equipment. On-chip trimming results in high output voltage accuracy. Accuracy is maintained over temperature, line, and load variations. Key parameters are tested over the specified temperature range (40 to +85).

The SO-8 version of the REG103 has an ERROR pin that provides a power good flag, indicating the regulator is in regulation. The REG103 is well protected-internal circuitry provides a current limit that protects the load from damage. Thermal protection circuitry keeps the chip from being damaged by excessive temperature. In addition to the SO-8 package, the REG103 is also available in the DDPAK and the SOT223-5.

REG103 Maximum Ratings

Supply Input Voltage, V_IN	0.3V to 16V
Enable Input	0.3V to V_IN
Error Flag Output	0.3V to 6V
Error Flag Current	2mA
Output Short-Circuit Duration	Indefinite
Operating Temperature Range	55 to +125
Storage Temperature Range	65 to +150
Junction Temperature	55 to +150
Lead Temperature (soldering, 3s, SO-8, SOT, and DDPAK)	+240

NOTE: (1) Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability.

REG103 Features

` NEW DMOS TOPOLOGY:
    Ultra Low Dropout Voltage:
    115mV Typ at 500mA and 3.3V Output
    Output Capacitor NOT Required for Stability
` FAST TRANSIENT RESPONSE
` VERY LOW NOISE: 33Vrms
` HIGH ACCURACY: ±2% max
` HIGH EFFICIENCY:
    I_GND = 1mA at I_OUT = 500mA
    Not Enabled: I_GND= 0.5A
` 2.5V, 2.7V, 3.0V, 3.3V, 5.0V, AND ADJUSTABLE OUTPUT VERSIONS
` FOLDBACK CURRENT LIMIT
` THERMAL PROTECTION
` OUTPUT VOLTAGE ERROR INDICATOR(1)
`SMALL SURFACE-MOUNT PACKAGES: SOT223-5, DDPAK-5, SO-8

REG103 Typical Application

· PORTABLE COMMUNICATION DEVICES
· BATTERY-POWERED EQUIPMENT
· PERSONAL DIGITAL ASSISTANTS
· MODEMS
· BAR-CODE SCANNERS
· BACKUP POWER SUPPLIES

REG103 Connection Diagram

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