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The R1276 is a 36-V rated synchronous step-down DC/DC converter with built-in transistor. Under cranking condition, the switching frequency is automatically reduced to keep output voltage level constant.
Specs & Datasheets
Consumer | Industrial | Automotive | |
---|---|---|---|
Input Voltage Range | 3.6 V to 30.0 V (36.0 V) | ||
Operating Temperature Range | -40°C to 105°C (125°C) | -40°C to 125°C (150°C) | -40°C to 125°C (150°C) |
Supply Current | Typ. 12 µA (VFM, at no switching) | ||
Standby Current | Typ. 4 µA | ||
Start-up Voltage | 4.5 V | ||
Output Voltage Range | Externally Adjustable: 0.7 V to 6.5 V | ||
Feedback Voltage | 0.64 V | ||
Feedback Voltage Accuracy | ±1.0% | ||
Output Current | 3 A | ||
Driver ON-resistance | High-side: Typ. 0.145 Ω Low-side: Typ. 0.095 Ω |
||
Oscillator Frequency | 250 kHz to 1 MHz (Settable with external resistors)*1 | ||
Efficiency | 95% | ||
Package | HSOP-18 |
TSD | ILX | OCP | OVP | UVLO | OVLO | Reverse | Shutdown | Soft Start | SSCG | PGOOD | Auto Discharge | Anti-ringing | Sequencing | Max Duty | Ext. Phase | LED Adjust |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Technical Documents
Quality & Packages
Product Name | Compatibility | Package | Marking | Reliability |
---|---|---|---|---|
R1276Sxxxx-E2-FE |
|
HSOP-18 | R1276S | R1276S-FE |
R1276Sxxxx-E2-YE |
|
HSOP-18 | R1276S | R1276S-YE |
R1276Sxxxx-E2-AE |
|
HSOP-18 | R1276S | R1276S-AE |
R1276Sxxxx-E2-KE |
|
HSOP-18 | R1276S | R1276S-KE |
Refer to the datasheets for the details on the product.
The package file includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.
Please contact us or our distributors for unpublished reliability information.
Sample / Buy
Authorized Distributors
Please contact your local distributors for any sales-related inquiry such as price, stock, delivery, etc.
TSD | Thermal Shutdown Function |
---|---|
ILX | LX Current Limit Function |
OCP | Overcurrent Protection |
OVP | Overvoltage Protection |
UVLO | Undervoltage Lockout Protection |
OVLO | Overvoltage Lockout Protection |
Reverse | Reverse Current Protection Circuit |
Shutdown | Shutdown Function |
Soft Start | Soft Start Function |
SSCG | Spread Spectrum Clock Generator Function |
PGOOD | Power Good Output |
Auto Discharge | Auto Discharge Function |
Anti-ringing | Anti-ringing Switch Function |
Sequencing | Start-up Sequencing Control |
Max Duty | Maximum Duty Cycle |
Ext. Phase | Externally Adjustable Phase Compensation |
LED Adjust | LED High-speed Dimming Control |