LM5008AMMX/NOPB
Synchronous Buck Switching RegulatorThe LM5008AMMX/NOPB is a synchronous buck switching regulator from Texas Instruments. View the full LM5008AMMX/NOPB datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
LM5008AMMX/NOPB shares its datasheet with LM5008, whose page lists every part number it covers.
Official LM5008AMMX/NOPB datasheet (PDF) — the source this page was extracted from.
LM5008AMMX/NOPB Key Specifications
| Parameter | Value |
|---|---|
| Output Current | 350mA |
| Output Voltage | Adjustable from 2.5V |
| Package Body Size | 3.00mm x 3.00mm |
| Carrier / Quantity | Large T&R, 3500 units |
| Input Voltage Range | 6V to 95V |
| Integrated Switch Rating | 100V N-channel |
| Feedback Reference Voltage | 2.5V |
| Minimum Recommended On-Time | 400ns |
| VCC Regulator Current Limit | 9mA |
| Current Limit Off-Time (FB=0V) | 35µs |
| Operating Junction Temperature | -40°C to 125°C |
| Thermal Resistance Junction-To-Ambient (VSSOP) | 139.7°C/W |
LM5008AMMX/NOPB Overview
Part: LM5008A — Texas Instruments
Type: Constant On-Time DC/DC Buck Switching Regulator
Description: 6–95 V input, 350 mA constant on-time buck regulator with integrated 100-V N-channel buck switch, 2.5 V feedback reference, and no loop compensation required.
Operating Conditions:
- Supply voltage (VIN): 6–95 V
- Operating junction temperature: -40 to 125 °C
- Output voltage adjustable from 2.5 V; minimum recommended on-time 400 ns at maximum input voltage
Absolute Maximum Ratings:
- VIN to GND: -0.3 to 100 V
- BST to GND: -0.3 to 114 V
- VCC to GND: 14 V max
- BST to SW: 14 V max
- All other inputs to GND: -0.3 to 7 V
- Storage temperature: -55 to 150 °C
Key Specs:
- VCC regulator output: 6.6 / 7 / 7.4 V (min/typ/max), VIN = 48 V
- VCC current limit: 9.2 mA typ
- Operating current (FB = 3 V, VIN = 48 V): 750 μA max (TJ = -40 to 125 °C)
- Shutdown current (RT/SD = 0 V): 176 μA max
- Current limit threshold: 0.51 A typ (TJ = 25 °C); 0.41–0.61 A (TJ = -40 to 125 °C)
- FB reference threshold: 2.5 V typ; 2.445–2.55 V over temperature
- Buck switch RDS(on): 1.25 Ω typ (TJ = 25 °C), 2.57 Ω max (over temperature, ITEST = 200 mA)
- Minimum off-time: 300 ns typ
- Thermal shutdown: 165 °C typ, 25 °C hysteresis
Features:
- Integrated 100-V N-channel buck switch
- Internal start-up regulator
- No loop compensation required
- Ultra-fast transient response
- On-time varies inversely with input voltage, keeping frequency nearly constant
- Intelligent current limit with forced off-time inversely proportional to VOUT
- Thermal shutdown, VCC UVLO, gate drive UVLO, maximum duty cycle limiter, precharge switch
- Remote shutdown via RT/SD pin
- No minimum load current requirement (difference from LM5008)
Applications:
- Non-isolated telecommunication buck regulators
- Secondary high-voltage post regulators
- 48-V automotive systems
Package:
- VSSOP-8 (DGK), 3.00 mm × 3.00 mm
- WSON-8 (NGU), 4.00 mm × 4.00 mm
LM5008AMMX/NOPB Features
- 1 · Operating Input Voltage Range: 6 V to 95 V
- Integrated 100-V N-Channel Buck Switch
- Internal Start-Up Regulator
- No Loop Compensation Required
- Ultra-Fast Transient Response
- On-Time Varies Inversely With Input Voltage
- Operating Frequency Remains Constant With Varying Line Voltage and Load Current
- Adjustable Output Voltage From 2.5 V
- Highly Efficient Operation
- Precision Internal Reference
- Low Bias Current
- Intelligent Current Limit
- Thermal Shutdown
- 8-Pin VSSOP and 8-Pin WSON Packages
- Create a Custom Design Using the LM5008A With the WEBENCH ® Power Designer
LM5008AMMX/NOPB Applications
- Non-Isolated Telecommunication Buck Regulators
- Secondary High-Voltage Post Regulators
- 48-V Automotive Systems
LM5008AMMX/NOPB Pin Configuration
Pin Functions
| PIN - NO. | PIN - NAME | TYPE | DESCRIPTION |
|---|---|---|---|
| 1 | SW | P | Switching node: power switching node. Connect to the output inductor, re-circulating diode, and bootstrap capacitor. |
| 2 | BST | I | Boost pin (bootstrap capacitor input): an external capacitor is required between the BST and the SW pins. A 0.01-μF ceramic capacitor is recommended. An internal diode charges the capacitor from V CC during each off-time. |
| 3 | RCL | I | Current limit off-time set pin: a resistor between this pin and RTN sets the off-time when current limit is detected. The off-time is preset to 35 μs if FB = 0 V. |
| 4 | RTN | G | Ground pin: ground for the entire circuit. |
| 5 | FB | I | Feedback input from regulated output: this pin is connected to the inverting input of the internal regulation comparator. The regulation threshold is 2.5 V. |
| 6 | RT/SD | I | On-time set pin: a resistor between this pin and VIN sets the switch on time as a function of V IN . The minimum recommended on time is 400 ns at the maximum input voltage. This pin can be used for remote shutdown. |
| 7 | VCC | P | Output from the internal high voltage series pass regulator: this regulated voltage provides gate drive power for the internal buck switch. An internal diode is provided between this pin and the BST pin. A local 0.47-μF decoupling capacitor is required. The series pass regulator is current limited to 9 mA. |
| 8 | VIN | P | Input voltage: input operating range from 6 V to 95 V. |
| - | EP | G | Exposed pad: the exposed pad has no electrical contact. Connect to system ground plane for reduced thermal resistance. (WSON package only) |
NGU Package 8-Pin WSON Top View
Pin Functions
LM5008AMMX/NOPB Electrical Characteristics
TJ = 25°C and VIN = 48 V (unless otherwise noted) (1)
| PARAMETER | TEST CONDITIONS | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
|---|---|---|---|---|---|---|---|
| VCC SUPPLY | VCC SUPPLY | VCC SUPPLY | VCC SUPPLY | VCC SUPPLY | VCC SUPPLY | VCC SUPPLY | VCC SUPPLY |
| V CC Reg | V CC regulator output | V IN = 48 V | T J = 25°C T = -40°C to 125°C | 6.6 | 7 | 7.4 | V |
| V IN - V CC | 6 V < V IN < 8.5 V | J | 100 | mV | |||
| V CC bypass threshold V CC bypass hysteresis | V IN increasing V IN = 6 V | 8.5 300 100 | V mV Ω | ||||
| V CC output impedance | V IN = 10 V V IN = 48 V | 8.8 0.8 | Ω Ω | ||||
| V CC current limit | V IN = 48 V | 9.2 | mA | ||||
| V CC UVLO V CC UVLO hysteresis V CC UVLO filter delay | V CC increasing V | T J = 25°C | 5.3 190 3 550 | V mV μs | |||
| IN I operating current | FB = 3 V, V IN = 48 | T J = -40°C to 125°C T J = 25°C | 110 | 750 | μA | ||
| I IN shutdown current | RT/SD = 0 V | T J = -40°C to 125°C | 176 | μA | |||
| CURRENT LIMIT | CURRENT LIMIT | CURRENT LIMIT T J = 25°C | CURRENT LIMIT | CURRENT LIMIT | CURRENT LIMIT 0.51 | CURRENT LIMIT | CURRENT LIMIT A |
| Current limit threshold | T J = -40°C to 125°C | 0.41 | 0.61 | ||||
| Current limit response time | I switch overdrive = 0.1 A, time to | switch off | 350 | ns | |||
| T OFF-1 | Off-time generator | FB = 0 V, R CL = 100 k Ω | 35 | μs | |||
| T OFF-2 | Off-time generator | FB = 2.3 V, R CL = 100 k Ω | 2.56 | μs | |||
| ON-TIME GENERATOR | ON-TIME GENERATOR | ON-TIME GENERATOR | ON-TIME GENERATOR | ON-TIME GENERATOR | ON-TIME GENERATOR | ON-TIME GENERATOR | ON-TIME GENERATOR |
| T ON - 1 | V IN = 10 V, R ON = 200 k Ω | T J = 25°C T J = -40°C to 125°C | 2.15 | 2.77 | 3.5 | μs | |
| T ON - 2 | V IN = 95 V, R ON = 200 k Ω | T J = 25°C T J = -40°C to 125°C | 200 | 300 | 420 | ns | |
| Remote shutdown threshold Remote shutdown hysteresis | Rising | T J = 25°C T J = -40°C to 125°C | 0.4 | 0.7 35 | 1.05 | V mV | |
| MINIMUM OFF-TIME | MINIMUM OFF-TIME | MINIMUM OFF-TIME | MINIMUM OFF-TIME | MINIMUM OFF-TIME | MINIMUM OFF-TIME | MINIMUM OFF-TIME | MINIMUM OFF-TIME |
| Minimum off-timer | V FB = 0 V | 300 | ns | ||||
| REGULATION AND OV COMPARATORS | REGULATION AND OV COMPARATORS | REGULATION AND OV COMPARATORS | REGULATION AND OV COMPARATORS | REGULATION AND OV COMPARATORS | REGULATION AND OV COMPARATORS | REGULATION AND OV COMPARATORS | REGULATION AND OV COMPARATORS |
| FB reference threshold | Internal reference, trip point for switch ON | T J = 25°C | 2.5 | V | |||
| FB overvoltage threshold FB bias current | Trip point for switch OFF | T J = -40°C to 125°C | 2.445 | 2.875 100 | 2.55 | V nA | |
| THERMAL SHUTDOWN | THERMAL SHUTDOWN | THERMAL SHUTDOWN | THERMAL SHUTDOWN | THERMAL SHUTDOWN | THERMAL SHUTDOWN | THERMAL SHUTDOWN | THERMAL SHUTDOWN |
| Tsd | Thermal shutdown temperature Thermal shutdown hysteresis | 165 25 | °C °C |
LM5008AMMX/NOPB Absolute Maximum Ratings
over operating free-air temperature range (unless otherwise noted) (1)
| MIN | MAX | UNIT | |
|---|---|---|---|
| V IN to GND | -0.3 | 100 | V |
| BST to GND | -0.3 | 114 | V |
| SW to GND (steady-state) | -1 | V | |
| BST to V CC | 100 | V | |
| BST to SW | 14 | V | |
| V CC to GND | 14 | V | |
| All other inputs to GND | -0.3 | 7 | V |
| Storage temperature, T stg | -55 | 150 | °C |
LM5008AMMX/NOPB Recommended Operating Conditions
over operating free-air temperature range (unless otherwise noted)
| MIN | MAX | UNIT | |
|---|---|---|---|
| V IN | 6 | 95 | V |
| Operating junction temperature | -40 | 125 | °C |
LM5008AMMX/NOPB Thermal Information
| THERMAL METRIC | (1) | LM5008A - DGK (VSSOP) - 8 PINS | LM5008A - NGU (WSON) - 8 PINS | UNIT |
|---|---|---|---|---|
| R θ JA | Junction-to-ambient thermal resistance | 139.7 | 42 | °C/W |
| R θ JC(top) | Junction-to-case (top) thermal resistance | 51.2 | 27.6 | °C/W |
| R θ JB | Junction-to-board thermal resistance | 70.5 | 18.5 | °C/W |
| ψ JT | Junction-to-top characterization parameter | 3.4 | 0.3 | °C/W |
| ψ JB | Junction-to-board characterization parameter | 69.5 | 18.5 | °C/W |
| R θ JC(bot) | Junction-to-case (bottom) thermal resistance | - | 4.3 | °C/W |
LM5008AMMX/NOPB Typical Application
Copyright © 2016, Texas Instruments Incorporated
Variants on the same datasheet
These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.
| Part Number | Manufacturer | Package |
|---|---|---|
| LM5008 | Texas Instruments | — |
| LM5008A | Texas Instruments | VSSOP (8) |
| LM5008AMM/NOPB | Texas Instruments | VSSOP-8 |
| LM5008AMM/NOPB.A | Texas Instruments | VSSOP-8 |
| LM5008AMM/NOPB.B | Texas Instruments | VSSOP-8 |
| LM5008AMMX | Texas Instruments | VSSOP-8 |
| LM5008AMMX/NOPB.A | Texas Instruments | VSSOP-8 |
| LM5008AMMX/NOPB.B | Texas Instruments | VSSOP-8 |
| LM5008ASD/NOPB | Texas Instruments | WSON-8 4x4mm |
| LM5008ASD/NOPB.A | Texas Instruments | WSON-8 4x4mm |
| LM5008ASD/NOPB.B | Texas Instruments | WSON-8 4x4mm |
| LM5008ASDX | Texas Instruments | WSON-8 4x4mm |
| LM5008ASDX/NOPB | Texas Instruments | WSON-8 4x4mm |
| LM5008ASDX/NOPB.A | Texas Instruments | WSON-8 4x4mm |
| LM5008ASDX/NOPB.B | Texas Instruments | WSON-8 4.0x4.0mm |
Other Switching Regulators (Buck)
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- LM2596 – Texas Instruments, Step-Down Voltage Regulator
- TPS562200 – Texas Instruments, Synchronous Buck Converter
- AP63203WU – Diodes Incorporated, Synchronous Buck Converter
- TPS54202 – Texas Instruments, Synchronous Buck Converter
- AP63357DV-7 – Diodes Incorporated, Synchronous Buck Converter
All Switching Regulators (Buck) datasheetsAll Texas Instruments datasheets (2,418)
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