Package Information
| Pitch (mm) | 0.5 |
| Lead Count (#) | 20 |
| Pkg. Type | QFN |
| Pkg. Dimensions (mm) | 3.50 x 4.00 x 0.85 |
| Pkg. Code | LOD |
Environmental & Export Classifications
| Moisture Sensitivity Level (MSL) | 3 |
| Pb (Lead) Free | Yes |
| ECCN (US) | EAR99 |
| HTS (US) | 8542390001 |
| RoHS (RAA211820GNP#HA0) | EnglishJapanese |
Product Attributes
| Longevity | 0000 Jul |
| Pkg. Type | QFN |
| Lead Count (#) | 20 |
| Carrier Type | Reel |
| Moisture Sensitivity Level (MSL) | 3 |
| Pitch (mm) | 0.5 |
| Pkg. Dimensions (mm) | 3.5 x 4.0 x 0.85 |
| Pb (Lead) Free | Yes |
| Pb Free Category | Pb-Free 100% Matte Tin Plate w/Anneal-e3 |
| Temp. Range | -40 to +125°C |
| Country of Assembly | Taiwan |
| Country of Wafer Fabrication | Japan |
| Price (USD) | 1ku | 2.00096 |
| Control Type | Peak Current Mode |
| IQ [Rail 1] (µA) | 90 |
| Input Voltage (Max) [Rail 1] (V) | 75 - 75 |
| Input Voltage (Min) [Rail 1] (V) | 4.5 |
| Length (mm) | 3.5 |
| MOQ | 6000 |
| Output Current (Max) [Rail 1] (A) | 2 |
| Output Voltage (Max) [Rail 1] (V) | 65 |
| Output Voltage (Min) [Rail 1] (V) | 0.8 |
| Outputs (#) | 1 |
| Parametric Category | Buck Regulators (Integrated FETs) |
| Peak Efficiency (%) | 90 |
| Power-On Reset | No |
| Qualification Level | Standard |
| SYNCH Capability | No |
| Simulation Model Available | iSim |
| Switching Frequency Range (Typical) (kHz) | 200 - 800 |
| Thickness (mm) | 0.85 |
| Topology [Rail 1] | Buck |
| Width (mm) | 4 |
Description
The RAA211820 is a DC/DC synchronous step-down (Buck) regulator that supports a 4.5V to 75V input voltage range and adjustable output voltage. It can deliver up to continuous 2A of continuous output current with premium load and line regulation performance.
The RAA211820 uses peak-current mode control architecture. Its PWM switching frequency is programmable to provide the best trade-off between transient response and efficiency. It also supports PFM operation and DEM to maximize light load efficiency, in addition to an external bias LDO input to further reduce power dissipation across the load range. The regulator also has an internal loop compensation circuit to reduce the external component count and BOM cost.
The RAA211820 provides useful functions such as internal or programmable soft-start and power good indicator. For safe operation, the RAA211820 also offers protection features such as cycle-by-cycle peak and valley current limit, input voltage UVLO, output voltage undervoltage (short-circuit) protection, and thermal shutdown.