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 1µF. Typical ground pin current is only 1mA (at IOUT = 500mA) and drops to 0.5µA in not enabled mode. Unlike regulators with PNP pass devices, quiescent current remains relatively constant over load variations and under dropout conditions
| REG103-25 | REG103-33 | REG103-5 | REG103-A | |
| Iout(Max)(A) | 0.5 | 0.5 | 0.5 | 0.5 |
| Vdo(Typ)(mV) | 115 | 115 | 160 | 115 |
| Iq(Typ)(mA) | 0.5 | 0.5 | 0.5 | 0.5 |
| Vin(Min)(V) | 2.1 | 2.1 | 2.1 | 2.1 |
| Vin(Max)(V) | 15 | 15 | 15 | 15 |
| Vout(Min)(V) | 2.5 | 3.3 | 5 | |
| Vout(Max)(V) | 2.5 | 3.3 | 5 | |
| Vout Adj(Min)(V) | 1.295 | |||
| Vout Adj(Max)(V) | 5.5 | |||
| Accuracy(%) | 2 | 2 | 2 | 2 |
| Output Capacitor Type | Capacitor Free | Capacitor Free | Capacitor Free | Capacitor Free |
| Fixed Output Options(V) | 2.5 | 3.3 | 5 | |
| Pin/Package | 5DDPAK/TO-263, 6SOT-223, 8SOIC | 5DDPAK/TO-263, 6SOT-223, 8SOIC | 5DDPAK/TO-263, 6SOT-223, 8SOIC | 5DDPAK/TO-263, 6SOT-223, 8SOIC |
| Rating | Catalog | Catalog | Catalog | Catalog |
| Regulated Outputs(#) | 1 | 1 | 1 | 1 |
| 器件 | 状态 | 价格（美元） | 封装 | 引脚 | 封装数量 | 封装载体 | 丝印标记 |
| REG103FA-A | OBSOLETE | DDPAK/TO-263 (KTT) | 5 | |||
| REG103FA-A/500 | NRND | 3.70 | 1ku | DDPAK/TO-263 (KTT) | 5 | 500 | LARGE T&R | REG 103FA-A |
| REG103FA-AKTTT | ACTIVE | 4.25 | 1ku | DDPAK/TO-263 (KTT) | 5 | 50 | SMALL T&R | REG 103FA-A |
| REG103FA-AKTTTG3 | ACTIVE | 4.25 | 1ku | DDPAK/TO-263 (KTT) | 5 | 50 | SMALL T&R | REG 103FA-A |
| REG103GA-A | ACTIVE | 3.50 | 1ku | SOT-223 (DCQ) | 6 | 78 | TUBE | R103GA |
| REG103GA-A/2K5 | NRND | 2.90 | 1ku | SOT-223 (DCQ) | 6 | 2500 | LARGE T&R | R103GA |
| REG103GA-A/2K5G4 | NRND | 2.90 | 1ku | SOT-223 (DCQ) | 6 | 2500 | LARGE T&R | R103GA |
| REG103GA-AG4 | ACTIVE | 3.50 | 1ku | SOT-223 (DCQ) | 6 | 78 | TUBE | R103GA |
| REG103UA-A | ACTIVE | 2.70 | 1ku | SOIC (D) | 8 | 75 | TUBE | REG 103U-A |
| REG103UA-A/2K5 | NRND | 2.25 | 1ku | SOIC (D) | 8 | 2500 | LARGE T&R | REG 103U-A |
| REG103UA-A/2K5G4 | NRND | 2.25 | 1ku | SOIC (D) | 8 | 2500 | LARGE T&R | REG 103U-A |
| REG103UA-AG4 | ACTIVE | 2.70 | 1ku | SOIC (D) | 8 | 75 | TUBE | REG 103U-A |
