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| Part Number | LM3520SD/NOPB | LM3570SD/NOPB | LM3520SDX/NOPB |
|---|---|---|---|
| Manufacturer | National Semiconductor | Texas Instruments | Texas Instruments |
| Product Status | Obsolete | Obsolete | Discontinued at Digi-Key |
| Type | DC DC Regulator | DC DC Regulator | DC DC Regulator |
| Topology | Step-Up (Boost) | Switched Capacitor (Charge Pump) | Step-Up (Boost) |
| Internal Switch(s) | Yes | Yes | Yes |
| Number of Outputs | 2 | 3 | 2 |
| Voltage - Supply (Min) | 2.7V | 2.7V | 2.7V |
| Voltage - Supply (Max) | 5.5V | 5.5V | 5.5V |
| Voltage - Output | 22.5V ~ 23.2V | 4.3V | 22.5V ~ 23.2V |
| Current - Output / Channel | 700mA (Switch) | 20mA | 700mA (Switch) |
| Frequency | 1.1MHz | 500kHz | 1.1MHz |
| Dimming | PWM | PWM | PWM |
| Applications | Backlight | Backlight | Backlight |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 14-WFDFN Exposed Pad | 14-WFDFN Exposed Pad | 14-WFDFN Exposed Pad |
| Supplier Device Package | 14-WSON (4x3) | 14-WSON (4x3) | 14-WSON (4x3) |
