MP155
Offline Primary Side 3W Regulator, 100mW No-Load Power

Product Description
The MP155 is a primary-side regulator that provides accurate constant voltage regulation without the opto-coupler, and supports buck, buck-boost, and flyback topologies. An integrated 500V MOSFET simplifies the structure and reduces costs. These features make it a competitive candidate for off-line low-power applications, such as home appliances and standby power. The MP155 is a green-mode operation regulator. Both the peak current and the switching frequency decrease as the load decreases. As a result, it offers excellent efficiency performance at light load, thus improving the overall average efficiency. The MP155 features various protections such as thermal shutdown (TSD), VCC under-voltage lockout (UVLO), overload protection (OLP), short-circuit protection (SCP), and open loop protection. The MP155 is available in the TSOT23-5 and SOIC8 packages.
Product Features
- Primary-side constant voltage (CV) control, supporting buck, buck-boost and flyback topologies
- Integrated 500V/20O MOSFET
- < 100mW No-load power consumption
- Up to 4W output power
- Maximum DCM output current of 130mA
- Maximum CCM output current of 220mA
- Low VCC operating current
- Frequency foldback
- Maximum frequency limit
- Peak current compression
- Internal high-voltage current source
- Internal 350ns leading-edge blanking
- Thermal shutdown (auto restart)
- VCC under-voltage lockout with hysteresis (UVLO)
- Timer-based overload protection.
- Short circuit protection
- Open loop protection
Parametrics
- Vac (max) (V)265
- Vfb (V)2.5
- ICC Latch (typ) (µA)16
- Vbr (V)500
- Rds(on) (Ω)20
- fsw (max) (kHz)56
- Isw Limit (mA)290
- Iout (DCM) (max) (mA)130
- Iout (CCM) (max) (mA)220
- Pout (max) (W)3
- Vac (min) (V)20
- VCC Off (V)3.4
- Power Range DefinedNo
- Control MethodOn-Off
- PackageSOIC-8, TSOT23-5
- GradeCatalog
- TypeBuck Regulator
- VCC Hysteresis (V)0.25
- Min Off Time (typ) (µs)18
- VCC Restart (V)2.4
- No-Load Pout (max) (mW)100
- Iregulator (mA)3.5
- Ileak (µA)10

Energy Efficient Off-line Regulator, EV Board
The MP155 is a primary-side regulator that provides accurate constant voltage regulation without the opto-coupler, and supports buck, buck-boost, and flyback topologies. An integrated 500V MOSFET simplifies the structure and reduces costs. These features make it a competitive candidate for off-line low-power applications, such as home appliances and standby power.
The MP155 is a green-mode operation regulator. Both the peak current and the switching frequency decrease as the load decreases. As a result, it offers excellent efficiency performance at light load, thus improving the overall average efficiency.
The MP155 features various protections such as thermal shutdown (TSD), VCC under-voltage lockout (UVLO), overload protection (OLP), short-circuit protection (SCP), and open loop protection.
The MP155 is available in the TSOT23-5 package.
$25.00 + tax
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