德州仪器的单通道 LDO 芯片 REG104GA-A
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单路输出 LDO、1.0A、可调节电压（1.295 至 5.5V）、低噪声、快速瞬态响应

说明
The REG104 is a family of low-noise, low-dropout linear regulators with low ground pin current. Its new DMOS *ology provides significant improvement over previous designs, including low dropout voltage (only 230mV t* 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 *R capacitors greater than 1µF.

T*ical ground pin current is only 1.7mA (at IOUT = 1A) and drops to 0.5µA in not enabled mode. Unlike regulators with PNP p* devices, quiescent current remains relatively constant over load variations and under dropout conditions.

The REG104 has very low output noise (t*ically 33µVRMS for VOUT = 3.3V with CNR = 0.01µF), 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°C to +85°C).

The REG104 is well protected—internal circuitry provides a current limit which protects the load from damage. Thermal protection circuitry keeps the chip from being damaged by excessive temperature. The REG104 is available in the DDPAK-5 and the SOT223-5.

特性

NEW DMOS TOPOLOGY:
Ultra Low Dropout Voltage:
230mV t* at 1A and 3.3V Output
Output Capacitor *T Required for Stability
FAST TRANSIENT R*PONSE
VERY LOW *ISE: 33µVRMS
HIGH ACCURACY: ±2% max
HIGH EFFICIENCY:
IGND = 1.7mA at IOUT = 1A
Not Enabled: IGND = 0.5µA
2.5V, 2.7V, 3.0V, 3.3V, 5.0V AND ADJUSTABLE OUTPUT VERSIONS
THERMAL PROTE*ION
SMALL SURFACE-MOUNT PACKAG*: SOT223-5, DDPAK-5

APPLICATIONS 应用
PORTABLE COMMUNICATION DEVIC*
BATTERY-POWERED EQUIPMENT
MODEMS
BAR-CODE SCANNERS
BACKUP POWER SUPPLI*
便携式通信设备
电池供电设备
调制解调器
条形码扫描仪
备用电源

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