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| Part Number | LM3551SDX/NOPB | LM3553SDX/NOPB | LM3552SDX/NOPB | LM3551SD/NOPB |
|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | National Semiconductor |
| Product Status | Obsolete | Active | Obsolete | Active |
| Type | DC DC Regulator | DC DC Regulator | DC DC Regulator | DC DC Regulator |
| Topology | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) | Step-Up (Boost) |
| Internal Switch(s) | Yes | Yes | Yes | Yes |
| Number of Outputs | 1 | 1 | 1 | 1 |
| Voltage - Supply (Min) | 2.7V | 2.7V | 2.7V | 2.7V |
| Voltage - Supply (Max) | 5.5V | 5.5V | 5.5V | 5.5V |
| Voltage - Output | - | - | - | - |
| Current - Output / Channel | 1A (Flash) | 1.2A (Flash) | 1A (Flash) | 1A (Flash) |
| Frequency | 1.25MHz | 1.2MHz | 1.25MHz | 1.25MHz |
| Dimming | - | I²C | - | - |
| Applications | Camera Flash | Backlight, Camera Flash | Camera Flash | Camera Flash |
| Operating Temperature | -40°C ~ 85°C (TA) | -30°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 14-WFDFN Exposed Pad | 12-WFDFN Exposed Pad | 14-WFDFN Exposed Pad | 14-WFDFN Exposed Pad |
| Supplier Device Package | 14-WSON (4x4) | 12-WSON (3x3) | 14-WSON (4x4) | 14-WSON (4x4) |
