TPS2559-Q1 Precision Adjustable Current-Limited Power-Distribution Switch
1 Features
- Qualified for Automotive Applications AEC-Q100 Qualified With the Following Results:
- Device HBM ESD Classification Level H2
- Device CDM ESD Classification Level C5
- 2.5 to 6.5 V Operating Range
- Adjustable 1.2 to 4.7 A I(LIMIT) (±4.7% at 4.7 A)
- 3.5 µs Short Circuit Shutoff (Typical)
- 13-mΩ High-Side MOSFET
- 2-µA Maximum Standby Supply Current
- Built-in Soft-Start
- Reverse Current Blocking when Disabled
- 8 kV / 15 kV System-Level ESD Capable
- 10-Pin SON (3-mm × 3-mm) Package with Wettable Flanks
2 Applications
- Automotive USB Ports/Hubs
- Automotive Internal Load Switch
3 Description
The TPS2559-Q1 power-distribution switch is intended for applications where a low resistance, precision current limit switch is required or heavy capacitive loads are encountered. The TPS2559-Q1 provides up to 5.5 A of continuous load current with a precise current limit set by a single resistor to ground. Output current is maintained at a safe level by switching into a constant-current mode when the output load exceeds the current-limit threshold. During overload events the output current is limited to the level set by R(ILIM). If a persistent overload occurs, the device goes into thermal shutoff to prevent damage to the TPS2559-Q1.
The power-switch rise and fall times are controlled to minimize current surges during turn on or off. The FAULT logic output asserts low during overcurrent or overtemperature conditions.
Device Information(1)
| PART NUMBER | PACKAGE | BODY SIZE (NOM) |
|---|---|---|
| TPS2559-Q1 | VSON (10) | 3.00mm x 3.00mm |
- For all available packages, see the orderable addendum at the end of the datasheet.
Simplified Schematic
4 Revision History
| DATE | REVISION | NOTES |
|---|---|---|
| December 2015 | * | Initial release. |
5 Device Comparison Table
| Device | Operation Range (V) |
OCP Mode | ICONT. Adj. Range (A) |
RDS(on) (mΩ) | IOS tolerance | Package |
|---|---|---|---|---|---|---|
| TPS2559-Q1 | 2.5 - 6.5 | Auto Retry | 5.5 | 13 | ±4.7% at 4.7 A | DRC (SON-10) |
| TPS2553-Q1 | 2.5 - 6.5 | Auto Retry | 1.2 | 85 (DBV) | ±6.8% at 1.3 A | DBV (SOT-23) |
| TPS2556/7-Q1 | 2.5 - 6.5 | Auto Retry | 5 | 22 | ±6.3% at 4.5 A | DRB (SON-8) |
| TPS2561A-Q1 (Dual Channels) |
2.5 - 6.5 | Auto Retry | 2.5 | 44 | 2.1 A to 2.5 A | DRC (SON-10) |
| TPS25200-Q1 (With OVP protection) |
2.5 - 6.5 (Withstand up to 20V) |
Auto Retry | 2.5 | 60 | ±6.3% at 2.7 A | DRV (SON-6) |
6 Pin Configuration and Functions
Pin Functions
| PIN | TYPE | DESCRIPTION | |
|---|---|---|---|
| NAME | NO. | ||
| GND | 1 | Ground connection, connect externally to PowerPAD | |
| IN | 2,3,4 | I | Input voltage, connect a 0.1 μF or greater ceramic capacitor from IN to GND as close to the IC as possible |
| EN | 5 | I | Enable input, logic high turns on power switch. |
| ILIM | 6 | O | External resistor used to set current-limit threshold; recommended. 24.9 kΩ ≤ R(ILIM) ≤ 100 kΩ. |
| OUT | 7,8,9 | O | Power-switch output |
| FAULT | 10 | O | Active-low open-drain output, asserted during over-current or overtemperature conditions. |
| PowerPAD™ | PAD | Internally connected to GND; used to heat-sink the part to the circuit board traces. Connect PowerPAD to GND pin externally. | |
