TPS65282RGER
Active4.5V TO 18V INPUT, 4A OUTPUT SYNCHRONOUS BUCK CONVERTER WITH DUAL POWER DISTRIBUTION SWITCHES
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TPS65282RGER
Active4.5V TO 18V INPUT, 4A OUTPUT SYNCHRONOUS BUCK CONVERTER WITH DUAL POWER DISTRIBUTION SWITCHES
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Technical Specifications
Parameters and characteristics for this part
| Specification | TPS65282RGER |
|---|---|
| Current - Output (Max) [Max] | 2.7 A |
| Fault Protection | Over Temperature, UVLO, Current Limiting (Adjustable) |
| Features | Status Flag, Slew Rate Controlled |
| Interface | On/Off |
| Mounting Type | Surface Mount |
| Number of Outputs | 2 |
| Operating Temperature [Max] | 125 °C |
| Operating Temperature [Min] | -40 C |
| Output Configuration | High Side |
| Output Type | N-Channel |
| Package / Case | 24-VFQFN Exposed Pad |
| Ratio - Input:Output | 1:1 |
| Rds On (Typ) | 100 mOhm |
| Supplier Device Package | 24-VQFN (4x4) |
| Switch Type | USB Switch |
| Voltage - Load [Max] | 18 V |
| Voltage - Load [Min] | 4.5 V |
| Voltage - Supply (Vcc/Vdd) | Not Required |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 4.00 | |
| Digi-Reel® | 1 | $ 4.00 | ||
| N/A | 0 | $ 2.53 | ||
| 140850 | $ 2.53 | |||
| Tape & Reel (TR) | 3000 | $ 2.01 | ||
| Texas Instruments | LARGE T&R | 1 | $ 3.02 | |
| 100 | $ 2.65 | |||
| 250 | $ 1.86 | |||
| 1000 | $ 1.50 | |||
Description
General part information
TPS65282 Series
The TPS65282 incorporates dual N-channel MOSFET power switches for USB power distribution systems that require dual power switches in a single package. It also integrates a buck monolithic converter. The device is intended to provide a total USB power distribution solution for digital TV, set-top boxes, tablet PC and VOIP phones etc applications, where precision current limiting is required or heavy capacitive loads or short circuits are encountered.
Dual 100-mΩ independent power distribution switch limits the output current to a programmable current limit threshold between typical 75 mA and 2.7 A by using an external resistor. The current limit accuracy can be achieved as tight as ±6% at higher current limit setting. TPS65282 device limits output current to a safe level by using a constant current mode when output load exceeds the current limit threshold. After deglitching time, TPS65282 provides circuit breaker functionality by latching off the power switch during over-current or reverse-voltage situations. Two back-to-back power MOSFETs prevents the current injects from output to input in shutdown. An internal reverse-voltage comparator disables the power switch when the output voltage is driven higher than the input to protect the circuits on the input side of the switch in normal operation. The nFAULT1/2 output asserts low during over-current and reverse-voltage conditions.
The buck DC/DC converter integrates power MOSFETs for optimized power efficiency and reduced external component. A wide 4.5-V to 18-V input supply range to buck encompasses most intermediate bus voltages operating off 5-V, 9-V, 12-V or 15-V power bus. Peak current mode control simplifies the compensation and fast transient response. Equipped with enable and soft-start pin, the DC/DC can be precisely sequenced and ramp up in order to align with other rails in the system. Cycle-by-cycle over-current protection and operating in hiccup mode limit MOSFET power dissipation during buck output short circuit or over loading fault conditions. The switching frequency of the converter can be programmed from 300 kHz to 1.4 MHz with an external resistor at ROSC pin. With ROSC pin connecting to V7V pin, floating, or grounding, a default fixed switching frequency can be selected. The buck also features a pulse skipping mode (PSM), which allows a power loss reduction on the input power supplied to the system to achieve high efficiency at light loading.
