SNVS122C May 1999 – May 2016 LM2595
PRODUCTION DATA.
- 1 Features
- 2 Applications
- 3 Description
- 4 Revision History
- 5 Description (continued)
- 6 Pin Configuration and Functions
-
7 Specifications
- 7.1 Absolute Maximum Ratings
- 7.2 ESD Ratings
- 7.3 Recommended Operating Conditions
- 7.4 Thermal Information
- 7.5 Electrical Characteristics - 3.3 V
- 7.6 Electrical Characteristics - 5 V
- 7.7 Electrical Characteristics - 12 V
- 7.8 Electrical Characteristics - Adjustable
- 7.9 Electrical Characteristics - All Output Voltage Versions
- 7.10 Typical Characteristics
- 8 Detailed Description
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12Device and Documentation Support
- 13Mechanical, Packaging, and Orderable Information
封裝選項(xiàng)
請(qǐng)參考 PDF 數(shù)據(jù)表獲取器件具體的封裝圖。
機(jī)械數(shù)據(jù) (封裝 | 引腳)
- NDH|5
- KTT|5
散熱焊盤機(jī)械數(shù)據(jù) (封裝 | 引腳)
- KTT|5
訂購(gòu)信息
7 Specifications
7.1 Absolute Maximum Ratings (1)(2)
| MIN | MAX | UNIT | |||
|---|---|---|---|---|---|
| Maximum supply voltage | 45 | V | |||
| ON/OFF pin input voltage | –0.3 | 25 | V | ||
| Feedback pin voltage | –0.3 | 25 | V | ||
| Output voltage to ground (steady-state) | –1 | V | |||
| Power dissipation | Internally limited | ||||
| Lead temperature | KTT package | Vapor phase (60 sec) | 215 | °C | |
| Infrared (10 sec) | 245 | ||||
| NDH package (soldering, 10 sec) | 260 | ||||
| Maximum junction temperature | 150 | °C | |||
| Storage temperature, Tstg | –65 | 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.
(2) If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and specifications.
7.2 ESD Ratings
| VALUE | UNIT | |||
|---|---|---|---|---|
| V(ESD) | Electrostatic discharge | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) | ±2000 | V |
(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
7.3 Recommended Operating Conditions
| MIN | MAX | UNIT | |
|---|---|---|---|
| Supply voltage | 4.5 | 40 | V |
| Temperature range, TJ | –40 | 125 | °C |
7.4 Thermal Information
| THERMAL METRIC(1) | LM2595 | UNIT | |||
|---|---|---|---|---|---|
| KTT (TO-263) |
NDH (TO-220) |
||||
| 5 PINS | 5 PINS | ||||
| RθJA | Junction-to-ambient thermal resistance(2)(3) |
Printed-circuit board with 1-oz copper area of approximately 1 in2 | — | 50 | °C/W |
| Printed-circuit board with 0.5 in2 of 1-oz copper area | 50 | — | |||
| Printed-circuit board with 2.5 in2 of 1-oz copper area | 30 | — | |||
| Double-sided, printed-circuit board with 3 in2 of 1-oz copper area | 20 | — | |||
| RθJC(top) | Junction-to-case (top) thermal resistance | 2 | 2 | °C/W | |
(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.
(2) The package thermal impedance is calculated in accordance to JESD 51-7.
(3) Thermal resistances were simulated on a 4-layer, JEDEC board
7.5 Electrical Characteristics – 3.3 V
Specifications are for TJ = 25°C (unless otherwise noted).| PARAMETER | TEST CONDITIONS | MIN(1) | TYP(2) | MAX(1) | UNIT | ||
|---|---|---|---|---|---|---|---|
| SYSTEM PARAMETERS(3) (see Figure 35 for test circuit) | |||||||
| VOUT | Output voltage | 4.75 V ≤ VIN ≤ 40 V, 0.1 A ≤ ILOAD ≤ 1 A |
TJ = 25°C | 3.168 | 3.3 | 3.432 | V |
| Over full operating temperature range | 3.135 | 3.465 | |||||
| η | Efficiency | VIN = 12 V, ILOAD = 1 A | 78% | ||||
(1) All limits specified at room temperature and temperature extremes. All room temperature limits are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
(3) External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator system performance. When the LM2595 is used as shown in the Figure 35 test circuit, system performance is shown in the test conditions column.
7.6 Electrical Characteristics – 5 V
Specifications are for TJ = 25°C (unless otherwise noted).| PARAMETER | TEST CONDITIONS | MIN(1) | TYP(2) | MAX(1) | UNIT | ||
|---|---|---|---|---|---|---|---|
| SYSTEM PARAMETERS(3) (see Figure 35 for test circuit) | |||||||
| VOUT | Output voltage | 7 V ≤ VIN ≤ 40 V, 0.1 A ≤ ILOAD ≤ 1 A |
TJ = 25°C | 4.8 | 5 | 5.2 | V |
| Over full operating temperature range | 4.75 | 5.25 | |||||
| η | Efficiency | VIN = 12 V, ILOAD = 1 A | 82% | ||||
(1) All limits specified at room temperature and temperature extremes. All room temperature limits are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
(3) External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator system performance. When the LM2595 is used as shown in the Figure 35 test circuit, system performance is shown in the test conditions column.
7.7 Electrical Characteristics – 12 V
Specifications are for TJ = 25°C (unless otherwise noted).| PARAMETER | TEST CONDITIONS | MIN(1) | TYP(2) | MAX(1) | UNIT | ||
|---|---|---|---|---|---|---|---|
| SYSTEM PARAMETERS(3) (see Figure 35 for test circuit) | |||||||
| VOUT | Output voltage | 15 V ≤ VIN ≤ 40 V, 0.1 A ≤ ILOAD ≤ 1 A |
TJ = 25°C | 11.52 | 12 | 12.48 | V |
| Over full operating temperature range | 11.4 | 12.6 | |||||
| η | Efficiency | VIN = 25 V, ILOAD = 1 A | 90% | ||||
(1) All limits specified at room temperature and temperature extremes. All room temperature limits are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
(3) External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator system performance. When the LM2595 is used as shown in the Figure 35 test circuit, system performance is shown in the test conditions column.
7.8 Electrical Characteristics – Adjustable
Specifications are for TJ = 25°C (unless otherwise noted).| PARAMETER | TEST CONDITIONS | MIN(1) | TYP(2) | MAX(1) | UNIT | ||
|---|---|---|---|---|---|---|---|
| SYSTEM PARAMETERS(3) (see Figure 35 for test circuit) | |||||||
| VFB | Feedback voltage | 4.5 V ≤ VIN ≤ 40 V, 0.1 A ≤ ILOAD ≤ 1 A | 1.23 | V | |||
| VOUT programmed for 3 V, circuit of Figure 35 |
TJ = 25°C | 1.193 | 1.267 | ||||
| Over full operating temperature range | 1.18 | 1.28 | |||||
| η | Efficiency | VIN = 12 V, VOUT = 3 V, ILOAD = 1 A | 78% | ||||
(1) All limits specified at room temperature and temperature extremes. All room temperature limits are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
(3) External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect switching regulator system performance. When the LM2595 is used as shown in the Figure 35 test circuit, system performance is shown in the test conditions column.
7.9 Electrical Characteristics – All Output Voltage Versions
Specifications are for TJ = 25°C, ILOAD = 200 mA, VIN = 12 V for the 3.3-V, 5-V, and adjustable versions, and VIN = 24 V for the 12-V version (unless otherwise noted).| PARAMETER | TEST CONDITIONS | MIN(1) | TYP(2) | MAX(1) | UNIT | ||
|---|---|---|---|---|---|---|---|
| DEVICE PARAMETERS | |||||||
| Ib | Feedback bias current | Adjustable version only, VFB = 1.3 V |
TJ = 25°C | 10 | 50 | nA | |
| Over full operating temperature range | 100 | ||||||
| fO | Oscillator frequency(3) | TJ = 25°C | 127 | 150 | 173 | kHz | |
| Over full operating temperature range | 110 | 173 | |||||
| VSAT | Saturation voltage | IOUT = 1 A, TJ = 25°C(4)(5) | 1 | 1.2 | V | ||
| Over full operating temperature range | 1.3 | ||||||
| DC | Max duty cycle (ON)(5) | 100% | |||||
| Min duty cycle (OFF)(6) | 0% | ||||||
| ICL | Current limit | Peak current(4)(5) | TJ = 25°C | 1.2 | 1.5 | 2.4 | A |
| Over full operating temperature range | 1.15 | 2.6 | |||||
| IL | Output leakage current | Output = 0 V(4)(6)(7) | 50 | μA | |||
| Output = −1 V | 2 | 15 | mA | ||||
| IQ | Quiescent current(6) | 5 | 10 | mA | |||
| ISTBY | Standby quiescent current | ON/OFF pin = 5 V (OFF)(7) | TJ = 25°C | 85 | 200 | μA | |
| Over full operating temperature range | 250 | ||||||
| ON/OFF CONTROL (see Figure 35 for test circuit) | |||||||
| ON/OFF pin logic input | 1.3 | V | |||||
| VIH | Threshold voltage, high | Regulator ON, over full operating temperature range | 0.6 | V | |||
| VIL | Threshold voltage, low | Regulator OFF, over full operating temperature range | 2 | V | |||
| IH | ON/OFF pin input current, high | VLOGIC = 2.5 V (regulator OFF) | 5 | 15 | μA | ||
| IL | ON/OFF pin input current, low | VLOGIC = 0.5 V (regulator ON) | 0.02 | 5 | μA | ||
(1) All limits specified at room temperature and temperature extremes. All room temperature limits are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely norm.
(3) The switching frequency is reduced when the second stage current limit is activated. The amount of reduction is determined by the severity of current overload.
(4) No diode, inductor or capacitor connected to output pin.
(5) Feedback pin removed from output and connected to 0 V to force the output transistor switch ON.
(6) Feedback pin removed from output and connected to 12 V for the 3.3-V, 5-V, and adjustable versions, and 15 V for the 12-V version, to force the output transistor switch OFF.
(7) VIN = 40 V.
7.10 Typical Characteristics
Circuit of Figure 35
Figure 1. Normalized Output Voltage
Figure 3. Efficiency
Figure 5. Switch Current Limit
Figure 7. Operating Quiescent Current
Figure 9. Minimum Operating Supply Voltage
Figure 11. ON/OFF Pin Current (Sinking)
Figure 13. Feedback Pin Bias Current
Figure 2. Line Regulation
Figure 4. Switch Saturation Voltage
Figure 6. Dropout Voltage
Figure 8. Shutdown Quiescent Current
Figure 10. ON /OFF Threshold Voltage
Figure 12. Switching Frequency