REG113
SBVS031C – MARCH 2001 – REVISED MARCH 2003
DMOS 400mA Low-Dropout Regulator
FEATURES
q CAP-FREE DMOS TOPOLOGY: ...
REG113
SBVS031C – MARCH 2001 – REVISED MARCH 2003
DMOS 400mA Low-Dropout
Regulator
FEATURES
q CAP-FREE DMOS TOPOLOGY: Ultra Low Dropout Voltage: 250mV typ at 400mA Output Capacitor not Required for Stability q UP TO 500mA PEAK, TYPICAL q FAST TRANSIENT RESPONSE q VERY LOW NOISE: 28µVrms q HIGH ACCURACY: ±1.5% max q HIGH EFFICIENCY: IGND = 850µA at IOUT = 400mA Not Enabled: IGND = 0.01µA q 2.5V, 2.85V, 3.0V, 3.3V, AND 5.0V OUTPUT VERSIONS q OTHER OUTPUT VOLTAGES AVAILABLE UPON REQUEST q FOLDBACK CURRENT LIMIT q THERMAL PROTECTION q SMALL SURFACE-MOUNT PACKAGES: SOT23-5 and MSOP-8
DESCRIPTION
The REG113 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 250mV typ at full load), and better transient performance. In addition, no output capacitor is required for stability, unlike conventional lowdropout
regulators that are difficult to compensate and require expensive low ESR capacitors greater than 1µF. Typical ground pin current is only 850µA (at IOUT = 400mA) and drops to 10nA when not enabled. Unlike
regulators with
PNP pass devices, quiescent current remains relatively constant over load variations and under dropout conditions. The REG113 has very low output noise (typically 28µVrms for VOUT = 3.3V with CNR = 0.01µF), making it ideal for use in portable communications equipment. Accuracy is maintained over temperature, line, an...