5.5V Maximum Output, 3A Valley Current, 1MHz Synchronous Boost with Auto Bypass Function
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- Parameters
- Features
- Description
| Part Number | SY20489BADC |
|---|
| Vin_min (V) | 2.5 |
|---|
| Vin_max (V) | 5.5 |
|---|
| Limit Current (A) | 3 |
|---|
| Fsw (MHz) | 1 |
|---|
| Vo_max (V) | 5.5 |
|---|
| Vref Accuracy | ±1.5% |
|---|
| Rdson1 | 50 |
|---|
| Rdson2 | 90 |
|---|
| Features / Special Function | Seamless bypass mode, disconnect @ shutdown, |
|---|
| Package | TSOT23-6 |
|---|
- 2.5V Minimum Input Voltage
- Adjustable Output Voltage from 2.5V to 5.5V
- Minimum 3A Valley Current Limit
- Capable of Seamless Transition between Boost and Bypass Mode
- Load Disconnect During Shutdown
- Low RDS(ON) at 5.0V Output: 50mΩ Main, 90mΩ Synchronous
- Output Overvoltage Protection (OVP)
- RoHS-Compliant and Halogen-Free
- Compact Package: TSOT23-6
The SY20489B is a high efficiency, synchronous step-up boost converter designed for single-cell lithium (Li-ion or Li-polymer) or two-cell to three-cell nickel (alkaline Ni-Cd or Ni-MH) battery-powered applications. It can operate down to 2.5V input and up to 5.5V output voltage. It uses NMOS for the main switch and PMOS for the synchronous switch.
The SY20489B disconnects the output from the input during shutdown mode. When the input voltage exceeds the regulated output voltage, the SY20489B will enter bypass mode automatically. The low operating current, along with a 0.1µA shutdown current (typ.) makes this device suitable for battery applications where extended battery life is important.
The SY20489B is available in a compact TSOT23- 6 package.
Evaluation Board
Photo of evaluation board
Photo of evaluation board
Photo of evaluation board
The EVB_SY20489BADC_1 is intended for evaluating a high efficiency, synchronous, step-up boost converter SY20489B. It can disconnect the output from input during the shutdown mode. When input voltage exceeds the regulated output voltage, SY20489B enters bypass mode automatically.
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