TPS25940
eFuse Power SwitchThe TPS25940 is a efuse power switch from Texas Instruments. View the full TPS25940 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
Manufacturer
Texas Instruments
Category
eFuse Power Switch
Key Specifications
| Parameter | Value |
|---|---|
| Accuracy | ±8% |
| Output Current | 5.3A |
| Function | Electronic Fuse |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C (TJ) |
| Package / Case | 20-WFQFN Exposed Pad |
| Packaging | MouseReel |
| Standard Pack Qty | 3000 |
| Supplier Device Package | 20-WQFN (4x3) |
| Input Voltage Range | 2.7V ~ 18V |
Overview
Part: TPS25940A, TPS25940L — Texas Instruments
Type: eFuse Power Switch
Description: A compact, feature-rich eFuse power switch with 2.7–18 V operating voltage, 42 mΩ typical R_ON, and 0.6 A to 5.3 A adjustable current limit, supporting DevSleep mode and true reverse current blocking.
Operating Conditions:
- Supply voltage: 2.7–18 V
- Operating junction temperature: -40 to 125 °C
- ILIM resistor: 16.9–150 kΩ
Absolute Maximum Ratings:
- Max input voltage: 20 V (22 V for 10 ms transient)
- Max junction temperature: 150 °C
- Max storage temperature: 150 °C
Key Specs:
- ON Resistance (R_ON): 42 mΩ (typ, 1 A ≤ I_OUT ≤ 5 A, T_J = 25°C)
- Operating Quiescent Current (I_Q(ON)): 199 μA (typ, V_IN = 12 V)
- DevSleep Mode Quiescent Current (I_Q(DEVSLP)): 95 μA (typ, V_IN = 2.7V to 18V)
- Disabled Quiescent Current (I_Q(OFF)): 15 μA (typ, V_IN = 12 V)
- Current Limit (I_LIM): 4.45 A (typ, R_ILIM = 20 kΩ, (V_IN - V_OUT) = 1 V)
- DevSleep Mode Current Limit (I_DEVSLP(LIM)): 0.67 A (typ)
- IMON Gain Factor (I_IMON:I_OUT): 52.3 μA/A (typ, 1 A ≤ I_OUT ≤ 5 A)
- Reverse Voltage Threshold (V_REVTH): -9.3 mV (typ, V_IN - V_OUT)
Features:
- 42 mΩ R_ON (Typical)
- 0.6 A to 5.3 A Adjustable Current Limit (±8%)
- IMON Current Indicator Output (±8%)
- ±2% Overvoltage, Undervoltage Threshold
- Reverse Current Blocking
- 1 μs Reverse Voltage Shutoff
- Programmable dVo/dt Control
- Power Good and Fault Outputs
- DevSleep Mode Support
- UL 2367 Recognized, UL60950 - Safe during Single Point Failure Test
Applications:
- PCIe/SATA/SAS HDD and SSD Drives
- Enterprise and Micro Servers
- Smart Load Switch
- Set-Top-Box (STB), DTVs and Game Consoles
- RAID Cards - Holdup Power Management
- Telecom Switches and Routers
- Adapter Powered Devices
Package:
- WQFN (20) - 3.00 mm x 4.00 mm
Features
- 1 · 2.7 V - 18 V Operating Voltage, 20 V (Max)
- 42 m Ω RON (Typical)
- 0.6 A to 5.3 A Adjustable Current Limit (±8%)
- IMON Current Indicator Output (±8%)
- 200 μ A Operating IQ (Typical)
- 95 μ A DevSleep Mode IQ (Typical)
- 15 μ A Disabled IQ (Typical)
- ±2% Overvoltage, Undervoltage Threshold
- Reverse Current Blocking
- 1 μ s Reverse Voltage Shutoff
- Programmable dVo/dt Control
- Power Good and Fault Outputs
- -40°C to 125°C Junction Temperature Range
- UL 2367 Recognized
- -File No. 169910
- -RILIM ≥ 20 k Ω (4.81 A max)
- UL60950 - Safe during Single Point Failure Test
- -Open/Short ILIM detection
Applications
- PCIe/SATA/SAS HDD and SSD Drives
- Enterprise and Micro Servers
- Smart Load Switch
- Set-Top-Box (STB), DTVs and Game Consoles
- RAID Cards - Holdup Power Management
- Telecom Switches and Routers
- Adapter Powered Devices
Pin Configuration
TPS25940 RVC PACKAGE (TOP VIEW)
Electrical Characteristics
Conditions are -40°C ≤ TJ=TA ≤ 125°C, 2.7 V ≤ V(IN) = 18 V, V(EN/UVLO) = 2 V, V(OVP) = V(DEVSLP) = V(PGTH) = 0 V, R(ILIM) = 150 k Ω , C(OUT) = 1 μF, C(dVdT) = OPEN, PGOOD = FLT = IMON = OPEN. Positive current into terminals. All voltages referenced to GND (unless otherwise noted)
| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|
| SUPPLY VOLTAGE AND INTERNAL UNDERVOLTAGE LOCKOUT | SUPPLY VOLTAGE AND INTERNAL UNDERVOLTAGE LOCKOUT | SUPPLY VOLTAGE AND INTERNAL UNDERVOLTAGE LOCKOUT | SUPPLY VOLTAGE AND INTERNAL UNDERVOLTAGE LOCKOUT | SUPPLY VOLTAGE AND INTERNAL UNDERVOLTAGE LOCKOUT | SUPPLY VOLTAGE AND INTERNAL UNDERVOLTAGE LOCKOUT | SUPPLY VOLTAGE AND INTERNAL UNDERVOLTAGE LOCKOUT |
| V (IN) | Operating Input Voltage | 2.7 | 18 | V | ||
| V (UVR) | Internal UVLO threshold, rising | 2.2 | 2.3 | 2.4 | V | |
| V (UVRhys) | Internal UVLO hysteresis | 105 | 116 | 125 | mV | |
| V (EN/UVLO) = 2 V, V (IN) = 3 V | 140 | 210 | 300 | |||
| I Q(ON) | Supply current, Enabled | V (EN/UVLO) = 2 V, V (IN) = 12 V | 140 | 199 | 260 | μA |
| V (EN/UVLO) = 2 V, V (IN) = 18 V | 140 | 202 | 270 | |||
| V (EN/UVLO) = 0 V, V (IN) = 3 V | 4 | 8.6 | 15 | |||
| I Q(OFF) | Supply current, Disabled | V (EN/UVLO) = 0 V, V (IN) = 12 V | 6 | 15 | 20 | μA |
| V (EN/UVLO) = 0 V, V (IN) = 18 V | 8 | 18.5 | 25 | |||
| I Q(DEVSLP) | Supply current, DevSleep Mode | V (DEVSLP) = 0 V, V (IN) = 2.7V to 18V | 70 | 95 | 130 | μA |
| ENABLE AND UNDERVOLTAGE LOCKOUT (EN/UVLO) INPUT | ENABLE AND UNDERVOLTAGE LOCKOUT (EN/UVLO) INPUT | ENABLE AND UNDERVOLTAGE LOCKOUT (EN/UVLO) INPUT | ENABLE AND UNDERVOLTAGE LOCKOUT (EN/UVLO) INPUT | ENABLE AND UNDERVOLTAGE LOCKOUT (EN/UVLO) INPUT | ENABLE AND UNDERVOLTAGE LOCKOUT (EN/UVLO) INPUT | ENABLE AND UNDERVOLTAGE LOCKOUT (EN/UVLO) INPUT |
| V (ENR) | EN/UVLO threshold voltage, rising | 0.97 | 0.99 | 1.01 | V | |
| V (ENF) | EN/UVLO threshold voltage, falling | 0.9 | 0.92 | 0.94 | V | |
| V (SHUTF) | EN threshold voltage for Low I Q shutdown, falling | 0.3 | 0.47 | 0.63 | V | |
| V (SHUTFhys) | EN hysteresis for low I Q shutdown, hysteresis (1) | 66 | mV | |||
| I EN | EN Input leakage current | 0 V ≤ V (EN/UVLO) ≤ 18 V | -100 | 0 | 100 | nA |
| OVER VOLTAGE PROTECTION (OVP) INPUT | OVER VOLTAGE PROTECTION (OVP) INPUT | OVER VOLTAGE PROTECTION (OVP) INPUT | OVER VOLTAGE PROTECTION (OVP) INPUT | OVER VOLTAGE PROTECTION (OVP) INPUT | OVER VOLTAGE PROTECTION (OVP) INPUT | OVER VOLTAGE PROTECTION (OVP) INPUT |
| V (OVPR) | Overvoltage Threshold Voltage, Rising, | 0.97 | 0.99 | 1.01 | V | |
| V (OVPF) | Overvoltage Threshold Voltage, Falling | 0.9 | 0.92 | 0.94 | V | |
| I (OVP) | OVP Input Leakage Current | 0 V ≤ V (OVP) ≤ 5 V | -100 | 0 | 100 | nA |
| DEVSLP MODE INPUT (DEVSLP): ACTIVE HIGH | DEVSLP MODE INPUT (DEVSLP): ACTIVE HIGH | DEVSLP MODE INPUT (DEVSLP): ACTIVE HIGH | DEVSLP MODE INPUT (DEVSLP): ACTIVE HIGH | DEVSLP MODE INPUT (DEVSLP): ACTIVE HIGH | DEVSLP MODE INPUT (DEVSLP): ACTIVE HIGH | DEVSLP MODE INPUT (DEVSLP): ACTIVE HIGH |
| V (DEVSLPR) | DEVSLP threshold voltage, rising | 1.6 | 1.85 | 2 | V | |
| V (DEVSLPF) | DEVSLP threshold voltage, falling | 0.8 | 0.96 | 1.1 | V | |
| I (DEVSLP) | DEVSLP input leakage current | 0.2 V ≤ V (DEVSLP) ≤ 18 V | 0.6 | 1 | 1.25 | μA |
| OUTPUT RAMP CONTROL (dVdT) | OUTPUT RAMP CONTROL (dVdT) | OUTPUT RAMP CONTROL (dVdT) | OUTPUT RAMP CONTROL (dVdT) | OUTPUT RAMP CONTROL (dVdT) | OUTPUT RAMP CONTROL (dVdT) | OUTPUT RAMP CONTROL (dVdT) |
| I (dVdT) | dVdT charging current | V (dVdT) = 0 V | 0.85 | 1 | 1.15 | μA |
| R (dVdT) | dVdT discharging resistance | EN/UVLO = 0 V, I (dVdT) = 10 mA sinking | 16 | 24 | Ω | |
| V (dVdTmax) | dVdT maximum capacitor voltage | 2.6 | 2.88 | 3.1 | V | |
| GAIN (dVdT) | dVdT to OUT gain | Δ V (OUT)/ Δ V (dVdT) | 11.65 | 11.9 | 12.05 | V/V |
| CURRENT LIMIT PROGRAMMING (ILIM) | CURRENT LIMIT PROGRAMMING (ILIM) | CURRENT LIMIT PROGRAMMING (ILIM) | CURRENT LIMIT PROGRAMMING (ILIM) | CURRENT LIMIT PROGRAMMING (ILIM) | CURRENT LIMIT PROGRAMMING (ILIM) | CURRENT LIMIT PROGRAMMING (ILIM) |
| V (ILIM) | ILIM bias voltage | 0.87 | V | |||
| R (ILIM) = 150 k Ω , (V (IN) - V (OUT) ) = 1 V | 0.53 | 0.58 | 0.63 | |||
| R (ILIM) = 88.7 k Ω , (V (IN) - V (OUT) ) = 1 V | 0.9 | 0.99 | 1.07 | |||
| R (ILIM) = 42.2 k Ω , (V (IN) - V (OUT) ) = 1 V | 1.92 | 2.08 | 2.25 | |||
| R (ILIM) = 24.9 k Ω , (V (IN) - V (OUT) ) = 1 V | 3.25 | 3.53 | 3.81 | |||
| I (LIM) | Current limit (2) | R (ILIM) = 20 k Ω , (V (IN) - V (OUT) ) = 1 V | 4.09 | 4.45 | 4.81 | A |
| R (ILIM) = 16.9 k Ω , (V (IN) - V (OUT) ) = 1 V | 4.78 | 5.2 | 5.62 | |||
| R (ILIM) = OPEN, Open resistor current limit (Single Point Failure Test: UL60950) | 0.35 | 0.45 | 0.55 | |||
| R (ILIM) = SHORT, Shorted resistor current limit (Single Point Failure Test: UL60950) | 0.55 | 0.67 | 0.8 | |||
| I (DEVSLP(LIM)) | DevSleep Mode Current Limit | 0.55 | 0.67 | 0.8 | A |
Absolute Maximum Ratings
over operating temperature range (unless otherwise noted) (1)
| VALUE | VALUE | UNIT | ||
|---|---|---|---|---|
| MIN | MAX | |||
| Input voltage range | IN, OUT, PGTH, PGOOD, EN/UVLO, OVP, DEVSLP, FLT | -0.3 | 20 | V |
| Input voltage range | IN (10 ms Transient) | 22 | V | |
| Input voltage range | dVdT, ILIM | -0.3 | 3.6 | V |
| Input voltage range | IMON | -0.3 | 7 | V |
| Sink current | PGOOD, FLT, dVdT | 10 | mA | |
| Source current | dVdT, ILIM, IMON | Internally Limited | Internally Limited | |
| Maximum junction, T J | Maximum junction, T J | -40 | 150 | °C |
| Storage temperature range, T stg | Storage temperature range, T stg | -65 | 150 | °C |
| Continuous power dissipation | Continuous power dissipation | See the Thermal Characteristics (2) | See the Thermal Characteristics (2) | See the Thermal Characteristics (2) |
Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | NOM | MAX | UNIT | ||
|---|---|---|---|---|---|
| Input | IN | 2.7 | 18 | V | |
| Input | EN/UVLO, OVP, DEVSLP, OUT, PGTH, PGOOD, FLT | 0 | 18 | V | |
| Input | dVdT, ILIM | 0 | 3 | V | |
| Input | IMON | 0 | 6 | V | |
| ILIM | 16.9 | 150 | k Ω | ||
| IMON | 1 | k Ω | |||
| External | OUT | 0.1 | μF | ||
| External | dVdT | 470 | nF | ||
| Operating junction temperature range, T J | Operating junction temperature range, T J | -40 | 25 | 125 | °C |
Thermal Information
| THERMAL METRIC | THERMAL METRIC | TPS25940 RVC (20) PINS | UNIT |
|---|---|---|---|
| R θ JA | Junction-to-ambient thermal resistance | 38.1 | °C/W |
| R θ JCtop | Junction-to-case (top) thermal resistance | 40.5 | °C/W |
| R θ JB | Junction-to-board thermal resistance | 13.6 | °C/W |
| ψ JT | Junction-to-top characterization parameter | 0.6 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 13.7 | °C/W |
| R θ JCbot | Junction-to-case (bottom) thermal resistance | 3.4 | °C/W |
Typical Application
The TPS25940 is a smart eFuse. It is typically used for Hot-Swap and Power rail protection applications. It operates from 2.7 V to 18 V with programmable current limit, overvoltage and undervoltage protection. The device aids in controlling the in-rush current and provides fast turn-off during reverse voltage conditions for systems such as Enterprise SSDs, HDDs, Servers, Power Back-up Storage units and RAID cards. The device also provides robust protection for multiple faults on the sub-system rail.
The following design procedure can be used to select component values for the device.
Alternatively, the WEBENCH® software may be used to generate a complete design. The WEBENCH® software uses an iterative design procedure and accesses a comprehensive database of components when generating a design. Additionally, a spreadsheet design tool TPS25940 Design Calculator is available on web folder.
This section presents a simplified discussion of the design process.
Related Variants
The following components are covered by the same datasheet.
| Part Number | Manufacturer | Package |
|---|---|---|
| TPS25940A | Texas Instruments | — |
| TPS25940A/L | Texas Instruments | — |
| TPS25940ARVCR | Texas Instruments | 20-WFQFN Exposed Pad |
| TPS25940ARVCT | Texas Instruments | |
| TPS25940L | Texas Instruments | — |
| TPS25940LRVCR | Texas Instruments | |
| TPS25940LRVCT | Texas Instruments | — |
| TPS25940X | Texas Instruments | — |
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