SBVS313 June 2017 TPS7A85A
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Pin Configuration and Functions
- 6 Specifications
- 7 Detailed Description
-
8 Application and Implementation
- 8.1
Application Information
- 8.1.1
External Component Selection
- 8.1.1.1 Adjustable Operation
- 8.1.1.2 ANY-OUT Programmable Output Voltage
- 8.1.1.3 ANY-OUT Operation
- 8.1.1.4 Increasing ANY-OUT Resolution for LILO Conditions
- 8.1.1.5 Current Sharing
- 8.1.1.6 Recommended Capacitor Types
- 8.1.1.7 Input and Output Capacitor Requirements (CIN and COUT)
- 8.1.1.8 Feed-Forward Capacitor (CFF)
- 8.1.1.9 Noise-Reduction and Soft-Start Capacitor (CNR/SS)
- 8.1.2 Start-Up
- 8.1.3 AC and Transient Performance
- 8.1.4 DC Performance
- 8.1.5 Sequencing Requirements
- 8.1.6 Negatively Biased Output
- 8.1.7 Reverse Current
- 8.1.8 Power Dissipation (PD)
- 8.1.1
External Component Selection
- 8.2 Typical Applications
- 8.1
Application Information
- 9 Power-Supply Recommendations
- 10Layout
封裝選項(xiàng)
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RGR|20
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- RGR|20
訂購信息
6 Specifications
6.1 Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted)(1)| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Voltage | IN, BIAS, PG, EN | –0.3 | 7 | V |
| IN, BIAS, PG, EN (5% duty cycle, pulse duration = 200 μs) | –0.3 | 7.5 | V | |
| SNS, OUT | –0.3 | VIN + 0.3 | V | |
| NR/SS, FB | –0.3 | 3.6 | V | |
| 50mV, 100mV, 200mV, 400mV, 800mV, 1.6V | –0.3 | VOUT + 0.3 | V | |
| Current | OUT | Internally limited | Internally limited | A |
| PG (sink current into device) | 5 | mA | ||
| Operating junction temperature, TJ | –55 | 150 | °C | |
| Storage temperature, Tstg | –55 | 150 | °C | |
(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
6.2 ESD Ratings
| VALUE | UNIT | |||
|---|---|---|---|---|
| V(ESD) | Electrostatic discharge | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±2000 | V |
| Charged-device model (CDM), per JEDEC specification JESD22-C101(2) | ±500 | |||
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. Manufacturing with less than 500-V HBM is possible with the necessary precautions. Pins listed as ±2000 V may actually have higher performance.
(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. Manufacturing with less than 250-V CDM is possible with the necessary precautions. Pins listed as ±500 V may actually have higher performance.
6.3 Recommended Operating Conditions
over junction temperature range (unless otherwise noted)| MIN | NOM | MAX | UNIT | ||
|---|---|---|---|---|---|
| VIN | Input supply voltage range | 1.1 | 6.5 | V | |
| VBIAS | Bias supply voltage range(1) | 3 | 6.5 | V | |
| VOUT | Output voltage range(2) | 0.8 | 5.1 | V | |
| VEN | Enable voltage range | 0 | VIN | V | |
| IOUT | Output current | 0 | 4 | A | |
| CIN | Input capacitor | 10 | 47 | μF | |
| COUT | Output capacitor | 47 | 47 || 10 || 10 (3) | μF | |
| CBIAS | BIAS Capacitor | 10 | μF | ||
| RPG | Power-good pullup resistance | 10 | 100 | kΩ | |
| CNR/SS | NR/SS capacitor | 10 | nF | ||
| CFF | Feed-forward capacitor | 10 | nF | ||
| R1 | Top resistor value in feedback network for adjustable operation | 12.1 (4) | kΩ | ||
| R2 | Bottom resistor value in feedback network for adjustable operation | 160 (5) | kΩ | ||
| TJ | Operating junction temperature | –40 | 125 | °C | |
(1) BIAS supply is required when the VIN supply is below 1.4 V. Conversely, no BIAS supply is required when the VIN supply is higher than or equal to 1.4 V. A BIAS supply helps improve dc and ac performance for VIN ≤ 2.2 V.
(2) This output voltage range does not include device accuracy or accuracy of the feedback resistors.
(3) The recommended output capacitors are selected to optimize PSRR for the frequency range of 400 kHz to 700 kHz. This frequency range is a typical value for dc-dc supplies.
(4) The 12.1-kΩ resistor is selected to optimize PSRR and noise by matching the internal R1 value.
(5) The upper limit for the R2 resistor is to ensure accuracy by making the current through the feedback network much larger than the leakage current into the feedback node.
6.4 Thermal Information
| THERMAL METRIC(1) | TPS7A85A | UNIT | |
|---|---|---|---|
| RGR (VQFN) | |||
| 20 PINS | |||
| RθJA | Junction-to-ambient thermal resistance | 43.4 | °C/W |
| RθJC(top) | Junction-to-case (top) thermal resistance | 36.8 | °C/W |
| RθJB | Junction-to-board thermal resistance | 17.6 | °C/W |
| ψJT | Junction-to-top characterization parameter | 0.8 | °C/W |
| ψJB | Junction-to-board characterization parameter | 17.6 | °C/W |
| RθJC(bot) | Junction-to-case (bottom) thermal resistance | 3.4 | °C/W |
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.
6.5 Electrical Characteristics
over operating junction temperature range (TJ = –40°C to +125°C), VIN = 1.4 V or VIN = VOUT(nom) + 0.5 V (whichever is greater), VBIAS = open, VOUT(nom) = 0.8 V(2), OUT connected to 50 Ω to GND(3), VEN = 1.1 V, CIN = 10 μF, COUT = 47 μF, CNR/SS = 0 nF, CFF = 0 nF, and PG pin pulled up to VIN with 100 kΩ unless otherwise noted. Typical values are at TJ = 25°C.| PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |||
|---|---|---|---|---|---|---|---|---|
| VIN | Input supply voltage range(1) | 1.1 | 6.5 | V | ||||
| VBIAS | Bias supply voltage range(1) | VIN = 1.1 V | 3 | 6.5 | V | |||
| VFB | Feedback voltage | 0.8 | V | |||||
| VNR/SS | NR/SS pin voltage | 0.8 | V | |||||
| VUVLO1(IN) | Input supply UVLO with BIAS | VIN rising with VBIAS = 3 V | 1.02 | 1.085 | ||||
| VHYS1(IN) | VUVLO1(IN) hysteresis | VBIAS = 3 V | 320 | mV | ||||
| VUVLO2(IN) | Input supply UVLO without BIAS | VIN rising | 1.31 | 1.39 | V | |||
| VHYS2(IN) | VUVLO2(IN) hysteresis | 253 | mV | |||||
| VUVLO(BIAS) | Bias supply UVLO | VBIAS rising VIN = 1.1 V |
2.83 | 2.9 | V | |||
| VHYS(BIAS) | VUVLO(BIAS) hysteresis | VIN = 1.1 V | 290 | mV | ||||
| VOUT | Output voltage | Range | Using the ANY-OUT pins | 0.8 – 1% | 3.95 + 1% | V | ||
| Using external resistors(4) | 0.8 – 1% | 5.1 + 1% | ||||||
| Accuracy(4) (5) | 0.8 V ≤ VOUT ≤ 5.1 V (6)
5 mA ≤ IOUT ≤ 4 A 1.4 V ≤ VIN ≤ 6.5 V |
–1% | 1% | |||||
| Accuracy with BIAS | 1.1V ≤ VIN ≤ 2.2 V 0.8 V ≤ VOUT ≤ 1.9 V 5 mA ≤ IOUT ≤ 4 A 3 V ≤ VBIAS ≤ 6.5 V |
–0.75% | 0.75% | |||||
| ΔVOUT / ΔVIN | Line regulation | IOUT = 5 mA 1.4 V ≤ VIN ≤ 6.5 V |
0.0035 | mV/V | ||||
| ΔVOUT / ΔIOUT | Load regulation | 5 mA ≤ IOUT ≤ 4 A 3 V ≤ VBIAS ≤ 6.5 V VIN = 1.1 V |
0.07 | mV/A | ||||
| 5 mA ≤ IOUT ≤ 4 A | 0.08 | |||||||
| 5 mA ≤ IOUT ≤ 4 A VOUT = 5.1 V |
0.4 | |||||||
| VDO | Dropout voltage | VIN = 1.4 V IOUT = 4 A VFB = 0.8 V – 3% |
215 | 320 | mV | |||
| VIN = 5.5 V IOUT = 4 A VFB = 0.8 V – 3% |
325 | 500 | ||||||
| VIN = 1.1 V VBIAS = 5 V IOUT = 4 A VFB = 0.8 V – 3% |
150 | 240 | ||||||
| VIN = 5.7 V IOUT = 4 A VFB = 0.8 V – 3% |
600 | |||||||
| ILIM | Output current limit | VOUT forced at 0.9 × VOUT(nom), VIN = VOUT(nom) + 0.4 V |
4.7 | 5.2 | 5.7 | A | ||
| ISC | Short-circuit current limit | RLOAD = 20 mΩ | 1 | A | ||||
| IGND | GND pin current | VIN = 6.5 V IOUT = 5 mA |
2.8 | 4 | mA | |||
| VIN = 1.4 V IOUT = 4 A |
4.8 | 6 | ||||||
| Shutdown, PG = open, VIN = 6.5 V VEN = 0.5 V |
25 | µA | ||||||
| IEN | EN pin current | VIN = 6.5 V VEN = 0 V and 6.5 V |
–0.1 | 0.1 | µA | |||
| IBIAS | BIAS pin current | VIN = 1.1 V VBIAS = 6.5 V VOUT(nom) = 0.8 V IOUT = 4 A |
2.3 | 3.5 | mA | |||
| VIL(EN) | EN pin low-level input voltage (disable device) |
0 | 0.5 | V | ||||
| VIH(EN) | EN pin high-level input voltage (enable device) |
1.1 | 6.5 | V | ||||
| VIT(PG) | PG pin threshold | For falling VOUT | 82% × VOUT | 88.3% × VOUT | 93% × VOUT | V | ||
| VHYS(PG) | PG pin hysteresis | For rising VOUT | 1% × VOUT | V | ||||
| VOL(PG) | PG pin low-level output voltage | VOUT < VIT(PG)
IPG = –1 mA (current into device) |
0.4 | V | ||||
| Ilkg(PG) | PG pin leakage current | VOUT > VIT(PG)
VPG = 6.5 V |
1 | µA | ||||
| INR/SS | NR/SS pin charging current | VNR/SS = GND VIN = 6.5 V |
4 | 6.2 | 9 | µA | ||
| IFB | FB pin leakage current | VIN = 6.5 V | –100 | 100 | nA | |||
| PSRR | Power-supply ripple rejection | VIN – VO UT = 0.5 V IOUT = 4 A CNR/SS = 100 nF CFF = 10 nF COUT = 47 μF || 10 μF || 10 μF |
f = 10 kHz VOUT = 0.8 V VBIAS = 5 V |
42 | dB | |||
| f = 500 kHz VOUT = 0.8 V VBIAS = 5 V |
39 | |||||||
| f = 10 kHz VOUT = 5 V |
40 | |||||||
| f = 500 kHz VOUT = 5 V |
25 | |||||||
| Vn | Output noise voltage | Bandwidth = 10 Hz to 100 kHz, VIN = 1.1 V VOUT = 0.8 V VBIAS = 5 V IOUT = 4 A CNR/SS = 100 nF CFF = 10 nF COUT = 47 μF || 10 μF || 10 μF |
4.4 | μVRMS | ||||
| Bandwidth = 10 Hz to 100 kHz VOUT = 5 V IOUT = 4 A CNR/SS = 100 nF CFF = 10 nF COUT = 47 μF || 10 μF || 10 μF |
8.4 | |||||||
| Tsd | Thermal shutdown temperature | Shutdown, temperature increasing | 160 | °C | ||||
| Reset, temperature decreasing | 140 | |||||||
| TJ | Operating junction temperature | –40 | 125 | °C | ||||
(1) BIAS supply is required when the VIN supply is below 1.4 V. Conversely, no BIAS supply is required when the VIN supply is higher than or equal to 1.4 V. A BIAS supply helps improve dc and ac performance for VIN ≤ 2.2 V.
(2) VOUT(nom) is the calculated VOUT target value from the ANY-OUT in a fixed configuration. In an adjustable configuration, VOUT(nom) is the expected VOUT value set by the external feedback resistors.
(3) This 50-Ω load is disconnected when the test conditions specify an IOUT value.
(4) When the device is connected to external feedback resistors at the FB pin, external resistor tolerances are not included.
(5) The device is not tested under conditions where VIN > VOUT + 1.25 V and IOUT = 4 A because the power dissipation is higher than the maximum rating of the package.
(6) For VOUT ≤ 5 V, VIN = VOUT + 0.5 V. For VOUT > 5 V, VIN = VOUT + 0.6 V.
6.6 Typical Characteristics
at TA = 25°C, VIN = 1.4 V or VIN = VOUT(NOM) + 0.5 V (whichever is greater), VBIAS = open, VOUT(NOM) = 0.8 V, VEN = 1.1 V, COUT = 47 μF, CNR/SS = 0 nF, CFF = 0 nF, and PG pin pulled up to VIN with 100 kΩ (unless otherwise noted)
| VIN = 1.2 V, VBIAS = 5 V, COUT = 47 μF || 10 μF || 10 μF, CNR/SS = 10 nF, CFF = 10 nF |
| VIN = 1.4 V, IOUT = 1 A, COUT = 47 μF || 10 μF || 10 μF, CNR/SS = 10 nF, CFF = 10 nF |
| VIN = VOUT + 0.4 V, VBIAS = 5.0 V, IOUT = 4 A, COUT = 47 μF || 10 μF || 10 μF, CNR/SS = 10 nF, CFF = 10 nF |
| VIN = 5.6 V, COUT = 47 μF || 10 μF || 10 μF, CNR/SS = 10 nF, CFF = 10 nF |
| IOUT = 4 A, COUT = 47 μF || 10 μF || 10 μF, CNR/SS = 10 nF, CFF = 10 nF |
| VIN = VOUT + 0.4 V, VBIAS = 5 V, IOUT = 4 A, RMS Noise BW = 10 Hz to 100 kHz, COUT = 47 μF || 10 μF || 10 μF, CNR/SS = 10 nF |
| VIN = 1.2 V, VOUT = 0.9 V, VBIAS = 5.0 V, IOUT = 4 A, COUT = 47 μF || 10 μF || 10 μF, CFF = 10 nF |
| IOUT, DC = 100 mA, COUT = 47 μF || 10 μF || 10 μF, CNR/SS = CFF = 10 nF, slew rate = 1 A/μs |
Time and VOUT Without Bias
| VIN = 1.2 V, VBIAS = 5.0 V, IOUT = 100 mA to 4 A, CNR/SS = CFF = 10 nF, slew rate = 1 A/μs |
(VOUT = 0.9 V)
| IOUT = 4 A, VBIAS = 0 V |
| VIN = 1.4 V, VBIAS = 0 V |
| VIN = 5.5 V |
| VIN = 1.1 V, IOUT = 5 mA |
| IOUT = 5 mA |
| VIN = 1.1 V |
| IOUT = 4 A, VBIAS = 5 V, COUT = 47 μF || 10 μF || 10 μF, CNR/SS = 10 nF, CFF = 10 nF |
| IOUT = 1 A, COUT = 47 μF || 10 μF || 10 μF, CNR/SS = 10 nF, CFF = 10 nF |
| IOUT = 4 A, COUT = 47 μF || 10 μF || 10 μF, CNR/SS = 10 nF, CFF = 10 nF |
Figure 8. PSRR vs Frequency and IOUT for VOUT = 5 V
| VIN = VOUT + 0.4 V, VOUT = 1 V, IOUT = 4 A,
COUT = 47 μF || 10 μF || 10 μF, CNR/SS = 10 nF, CFF = 10 nF |
| VIN = VOUT + 0.4 V and VBIAS = 5 V for VOUT ≤ 2.2 V, IOUT = 4 A, RMS Noise BW = 10 Hz to 100 kHz, COUT = 47 μF || 10 μF || 10 μF, CNR/SS = 10 nF, CFF = 10 nF |
| VIN = VOUT + 0.4 V, VBIAS = 5 V, IOUT = 4 A, RMS Noise BW = 10 Hz to 100 kHz, COUT = 47 μF || 10 μF || 10 μF, CFF = 10 nF |
| VIN = 5.6 V, IOUT = 4 A, RMS Noise BW = 10 Hz to 100 kHz, COUT = 47 μF || 10 μF || 10 μF, CFF = 10 nF |
||
| VIN = VOUT + 0.3 V, VBIAS = 5 V, IOUT, DC = 100 mA, slew rate = 1 A/μs, CNR/SS = CFF = 10 nF, COUT = 47 μF || 10 μF || 10 μF |
VOUT With Bias
| VOUT = 5 V, IOUT, DC = 100 mA, IOUT = 100 mA to 4 A, COUT = 47 μF || 10 μF || 10 μF, CNR/SS = CFF = 10 nF |
Time and Slew Rate
| VIN = 1.2 V, VBIAS = 5.0 V, COUT = 47 μF || 10 μF || 10 μF, CNR/SS = CFF = 10 nF, slew rate = 1 A/μs |
(VOUT = 0.9 V)
| IOUT = 4 A, VBIAS = 6.5 V |
| VIN = 1.1 V, VBIAS = 3 V |
| IOUT = 100 mA to 4 A |
| IOUT = 5 mA |
| IOUT = 5 mA |
| VIN = 1.1 V, IOUT = 5 mA |
| VIN = 1.1 V |
| VIN = 6.5 V |