Silergy SY26501
The SY26501 develops a peak current mode-controlled boost regulator and a high-side driver with accurate current monitor to drive the optical modules. The device operates over a wide input voltage from 2.8V to 5.5V and is capable of generating up to 70V regulated output, a 1×/1.8× dual-gain current mirror with a track and hold output buffer, which is unique to simplify the fiber module circuit design with a MCU with regular resolution ADC. The SY26501 operates at a fixed 850kHz switching frequency that allows use of small external ceramic capacitors and inductor.| Part No. | SY26501 |
|---|---|
| Datasheet | SY26501 Download |
| Manufacturer |  Silergy |
| Description | 2.5mA Precision Protection APD Bias Dual-Gain Track/Hold Current Mirror |
| Buy | Stock & Price |
GENERAL DESCRIPTION
The SY26501 features cycle-by-cycle current limit of boost switch, adjustable driver current limit, input UVLO and thermal protection. The SY26501 is available in a thermally enhanced, QFN3×3-16 package. It operates over an ambient temperature range of -40°C to +85°C.FEATURES
● Wide Input Range: 2.8V to 5.5V● Wide Output Voltage Range from (VIN + 5V) to 70V
● 850kHz Switching Frequency
● Less Than 1μA Shutdown Current
● 1:30 Output Voltage Programming
● Adjustable Precision, Over-Current Protection
● Internal 1×/1.8×Dual-Gain Current Mirror
● Up to 2.5V Voltage Buffer for Full-Scale Output Current
● Input Voltage UVLO
● Over Temperature Protection
● Full Chain Circuit: Bias-Mirror-Track/Hold
● Compact Package: QFN3×3-16
● -40°C to +85°C Operating Temperature Range
APPLICATIONS
● Fiber Modules with APD Photon Sensor● Laser Beam Finders (LIDA) Typical
APPLICATIONS
VIN: 2.8V to 5.5V CIN RSIN CSIN RILMT CVREF L1 IN SW APD Current MB Mirror RLIM VS 1:30 Mirror Bias Voltage EN Program TH VREF 2.5V VREF THXOR GAIN VMON PGND AGND D1 VOUT (70V maximum) COUT RMB CMB RVMON CVMON D/A EN I/O MCU I/O I/O AD Figure1.
