LM5164DDAR
Synchronous Buck ConverterThe LM5164DDAR is a synchronous buck converter from Texas Instruments. View the full LM5164DDAR datasheet below including key specifications, electrical characteristics, absolute maximum ratings.
LM5164DDAR shares its datasheet with LM5164, whose page lists every part number it covers.
Official LM5164DDAR datasheet (PDF) — the source this page was extracted from.
Manufacturer
Texas InstrumentsCategory
Switching Regulators (Buck)Package
8-PowerSOIC (0.154", 3.90mm Width)
Lifecycle
Production (Last Updated: 1 day ago)
LM5164DDAR Key Specifications
| Parameter | Value |
|---|---|
| Output Current | 1A |
| Switching Frequency | Up to 1MHz |
| Function | Step-Down |
| Height | 1.7 mm |
| Length | 4.89 mm |
| Lifecycle Status | Production (Last Updated: 1 day ago) |
| Manufacturer Lifecycle Status | ACTIVE (Last Updated: 1 day ago) |
| Max Duty Cycle | 99 % |
| Max Junction Temperature (Tj) | 150 °C |
| Max Operating Temperature | 150 °C |
| Max Supply Voltage | 100 V |
| Min Operating Temperature | -40 °C |
| Min Supply Voltage | 6 V |
| Mounting Type | Surface Mount |
| Nominal Supply Current | 600 µA |
| Number of Channels | 1 |
| Number of Outputs | 1 |
| Number of Outputs | 1 |
| Number of Pins | 8 |
| Operating Temperature | -40°C ~ 150°C (TJ) |
| Output Configuration | Positive |
| Output Current | 1 A |
| Output Type | Adjustable |
| Package / Case | 8-PowerSOIC (0.154", 3.90mm Width) |
| RoHS | Compliant |
| Schedule B | 8542390000 |
| Supplier Device Package | 8-SO PowerPad |
| Switching Frequency | 1 MHz |
| Synchronous Rectifier | Yes |
| Thickness | 1.48 mm |
| Topology | Buck |
| Topology | Buck |
| Input Voltage (Max) | 100V |
| Input Voltage (Min) | 6V |
| Output Voltage (Max) | 100V |
| Output Voltage | 1.2V |
| Width | 3.9 mm |
LM5164DDAR Overview
Part: LM5164 (LM5164DDAR) — Texas Instruments
Type: Synchronous Buck DC/DC Converter (COT control)
Description: 6–100 V input, 1 A synchronous buck converter with integrated 0.725 Ω high-side and 0.34 Ω low-side FETs, 10.5 μA no-load quiescent current and 50 ns minimum on/off times.
Operating Conditions:
- Supply voltage (VIN): 6–100 V
- Operating junction temperature: -40 to +150 °C
- Load current: up to 1.25 A (1 A nominal)
- Switching frequency: up to 1000 kHz; programmable on-time 50–10000 ns
Absolute Maximum Ratings:
- Max supply voltage: VIN to GND 100 V (EN to GND 100 V)
- Max junction temperature: 150 °C
- Storage temperature: -65 to 150 °C
Key Specs:
- Shutdown current (VEN = 0 V): 3 μA typ, 15 μA max
- Sleep current (VEN = 2.5 V, VFB = 1.5 V): 10.5 μA typ, 25 μA max
- Active current (VEN = 2.5 V): 600 μA typ, 880 μA max
- FB regulation voltage: 1.2 V typ (1.181–1.218 V)
- High-side RDSON: 0.725 Ω typ (ISW = -100 mA); low-side RDSON: 0.33 Ω typ (ISW = 100 mA)
- Peak current limit: 1.5 A typ (1.25–1.75 A); valley current limit: 1.2 A typ (0.95–1.4 A)
- Internal soft-start: 3 ms typ (1.75–4.75 ms)
- EN rising threshold: 1.5 V typ; thermal shutdown: 175 °C typ with 10 °C hysteresis
- Thermal resistance RθJA: 43.4 °C/W (DDA package)
Features:
- Constant on-time (COT) control with no loop compensation components
- Diode emulation for high light-load efficiency
- Meets CISPR 25 class 5 EMI standard
- Integrated synchronous rectifier, internal VCC bias regulator and boot diode
- Peak and valley current-limit protection, input UVLO, thermal shutdown
- Precision enable with programmable UVLO
- Open-drain power-good indicator
- Monotonic start-up into prebiased loads
Applications:
- Industrial battery packs (≥ 10S)
- E-bike, e-scooter, LEV battery packs
- Motor drives, drones, communications equipment
Package:
- DDA, 8-pin SO PowerPAD (4.9 mm × 6 mm, 1.27 mm pin pitch)
LM5164DDAR Features
- Designed for reliable and rugged applications
- -Wide input voltage range of 6V to 100V
- -Junction temperature range: -40°C to +150°C
- -Fixed 3ms internal soft-start timer
- -Peak and valley current-limit protection
- -Input UVLO and thermal shutdown protection
- Optimized for ultra-low EMI requirements
- -Meets CISPR 25 class 5 standard
- Designed for scalable Industrial power supplies and battery packs
- -Low minimum on- and off-times of 50ns
- -Adjustable switching frequency up to 1MHz
- -Diode emulation for high light-load efficiency
- -10.5μA no-load input quiescent current
- -3μA shutdown quiescent current
- Integration reduces design size and cost
- -COT mode control architecture
- -Integrated 0.725Ω NFET buck switch
- -Integrated 0.34Ω NFET synchronous rectifier eliminates external Schottky diode
- -1.2V internal voltage reference
- -No loop compensation components
- -Internal VCC bias regulator and boot diode
- -Open-drain power-good indicator
- -8-pin SOIC package with PowerPAD ™ integrated circuit package
- Create a custom regulator design using the LM5164 with WEBENCH ® Power Designer
LM5164DDAR Applications
- Industrial battery pack (≥ 10S)
- Battery pack - e-bike, e-scooter, LEV
- Motor drives, drones, communications equipment
LM5164DDAR Pin Configuration
Figure 4-1. DDA Package 8-Pin SO PowerPAD™ Integrated Circuit Package (Top View)
Table 4-1. Pin Functions
| PIN - NO. | PIN - NAME | TYPE (1) | DESCRIPTION |
|---|---|---|---|
| 1 | GND | G | Ground connection for internal circuits |
| 2 | VIN | P/I | Regulator supply input pin to high-side power MOSFET and internal bias regulator. Connect directly to the input supply of the buck converter with short, low impedance paths. |
| 3 | EN/UVLO | I | Precision enable and undervoltage lockout (UVLO) programming pin. If the EN/UVLO voltage is below 1.1V, the converter is in shutdown mode with all functions disabled. If the UVLO voltage is greater than 1.1V and below 1.5V, the converter is in standby mode with the internal VCC regulator operational and no switching. If the EN/UVLO voltage is above 1.5V, the start-up sequence begins. |
| 4 | RON | I | On-time programming pin. A resistor between this pin and GND sets the buck switch on-time. |
| 5 | FB | I | Feedback input of voltage regulation comparator |
| 6 | PGOOD | O | Power good indicator. This pin is an open-drain output pin. Connect to a source voltage through an external pullup resistor between 10kΩ to 100kΩ. |
| 7 | BST | P/I | Bootstrap gate-drive supply. Required to connect a high-quality 2.2nF 50V X7R ceramic capacitor between BST and SW to bias the internal high-side gate driver. |
| 8 | SW | P | Switching node that is internally connected to the source of the high-side NMOS buck switch and the drain of the low-side NMOS synchronous rectifier. Connect to the switching node of the power inductor. |
| - | EP | - | Exposed pad of the package. No internal electrical connection. Connect the EP to the GND pin and connect to a large copper plane to reduce thermal resistance. |
(1) G = Ground, I = Input, O = Output, P = Power
LM5164DDAR Electrical Characteristics
Typical values correspond to TJ = 25°C. Minimum and maximum limits apply over the full -40°C to 150°C junction temperature range unless otherwise indicated. VIN = 24V and VEN/UVLO = 2V unless otherwise stated.
| PARAMETER | PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|---|
| SUPPLY CURRENT (VIN) | SUPPLY CURRENT (VIN) | |||||
| I Q-SHUTDOWN | VIN shutdown current | V EN = 0V | 3 | 15 | μA | |
| I Q-SLEEP1 | VIN sleep current | V EN = 2.5V, V FB = 1.5V | 10.5 | 25 | μA | |
| I Q-ACTIVE | VIN active current | V EN = 2.5V | 600 | 880 | μA | |
| PRECISION ENABLE (EN/UVLO) | PRECISION ENABLE (EN/UVLO) | |||||
| V SD-RISING | Shutdown threshold | V EN/UVLO rising | 1.1 | V | ||
| V SD-FALLING | Shutdown threshold | V EN/UVLO falling | 0.45 | V | ||
| V EN-RISING | Enable threshold | V EN/UVLO rising | 1.45 | 1.5 | 1.55 | V |
| V EN-FALLING | Enable threshold | V EN/UVLO falling | 1.35 | 1.4 | 1.44 | V |
| FEEDBACK VOLTAGE (FB) | FEEDBACK VOLTAGE (FB) | |||||
| V REF | FB regulation voltage | V FB falling | 1.181 | 1.2 | 1.218 | V |
| TIMING (RON) | TIMING (RON) | |||||
| t ON1 | On-time1 | V VIN = 6V, R RON = 75kΩ | 5000 | ns | ||
| t ON2 | On-time2 | V VIN = 6V, R RON = 25kΩ | 1650 | ns | ||
| t ON3 | On-time3 | V VIN = 12V, R RON = 75kΩ | 2550 | ns | ||
| t ON4 | On-time4 | V VIN = 12V, R RON = 25kΩ | 830 | ns | ||
| POWER GOOD MONITOR (PGOOD) | POWER GOOD MONITOR (PGOOD) | |||||
| V PG-UTH | FB upper threshold for PGOOD high to low | V FB rising | 1.105 | 1.14 | 1.175 | V |
| V PG-LTH | FB lower threshold for PGOOD high to low | V FB falling | 1.055 | 1.08 | 1.1 | V |
| V PG-HYS | PGOOD upper and lower threshold hysteresis | V FB falling | 60 | mV | ||
| R PG | PGOOD pulldown resistance | V FB = 1V | 30 | Ω | ||
| BOOTSTRAP (BST) | BOOTSTRAP (BST) | |||||
| V BST-UV | Gate drive UVLO | V BST rising | 2.7 | 3.4 | V | |
| POWER SWITCHES | POWER SWITCHES | |||||
| R DSON-HS | High-side MOSFET R DSON | I SW = -100mA | 0.725 | Ω | ||
| R DSON-LS | Low-side MOSFET R DSON | I SW = 100mA | 0.33 | Ω |
LM5164DDAR Absolute Maximum Ratings
Over the recommended operating junction temperature range of -40°C to +150°C (unless otherwise noted) (1)
| MIN | MAX | UNIT | ||
|---|---|---|---|---|
| Input voltage | VIN to GND | -0.3 | 100 | V |
| Input voltage | EN to GND | -0.3 | 100 | V |
| Input voltage | FB to GND | -0.3 | 5.5 | V |
| Input voltage | RON to GND | -0.3 | 5.5 | V |
| Bootstrap capacitor | External BST to SW capacitance | 1.5 | 2.5 | nF |
| Output voltage | BST to GND | -0.3 | 105.5 | V |
| Output voltage | BST to SW | -0.3 | 5.5 | V |
| Output voltage | SW to GND | -1.5 | 100 | V |
| Output voltage | SW to GND (20ns transient) | -3 | V | |
| Output voltage | PGOOD to GND | -0.3 | 14 | V |
| Operating junction temperature, T J | Operating junction temperature, T J | -40 | 150 | °C |
| Storage temperature, T stg | Storage temperature, T stg | -65 | 150 | °C |
LM5164DDAR Recommended Operating Conditions
Over the recommended operating junction temperature range of -40°C to +150°C (unless otherwise noted) (1)
| MIN | NOM | MAX | UNIT | ||
|---|---|---|---|---|---|
| V IN | Input voltage | 6 | 100 | V | |
| V SW | Switch node voltage | 100 | V | ||
| V EN/UVLO | Enable voltage | 100 | V | ||
| I LOAD | Load current | 1 | 1.25 | A | |
| F SW | Switching frequency | 1000 | kHz | ||
| C BST | External BST to SW capacitance | 2.2 | 2.2 | 2.2 | nF |
| t ON | Programmable on-time | 50 | 10000 | ns |
LM5164DDAR Thermal Information
| THERMAL METRIC (1) | LM5164 DDA (SOIC) - 8 PINS | UNIT | |
|---|---|---|---|
| R θJA | Junction-to-ambient thermal resistance | 43.4 | °C/W |
| R θJC(top) | Junction-to-case (top) thermal resistance | 59.5 | °C/W |
| R θJB | Junction-to-board thermal resistance | 16.1 | °C/W |
| Ψ JT | Junction-to-top characterization parameter | 4.0 | °C/W |
| Ψ JB | Junction-to-board characterization parameter | 16.3 | °C/W |
| R θJC(bot) | Junction-to-case (bottom) thermal resistance | 3.9 | °C/W |
LM5164DDAR Typical Application
The LM5164 requires only a few external components to step down from a wide range of supply voltages to a fixed output voltage. Several features are integrated to meet system design requirements, including the following:
- Precision enable
- Input voltage UVLO
- Internal soft start
- Programmable switching frequency
- A PGOOD indicator
To expedite and streamline the process of designing of a LM5164-based converter, a comprehensive LM5164 quickstart calculator is available for download to assist the designer with component selection for a given application. This tool is complemented by the availability of an evaluation module (EVM), numerous PSPICE models, as well as TI's WEBENCH® Power Designer.
LM5164DDAR Package Information
| PART NUMBER | PACKAGE (1) | PACKAGE SIZE (2) |
|---|---|---|
| LM5164 | DDA (SO PowerPAD, 8) | 4.9mm × 6mm |
- (1) For more information, see Section 10.
- (2) The package size (length × width) is a nominal value and includes pins, where applicable.
Typical Efficiency, VOUT = 12V
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 |
|---|---|---|
| LM5164 | Texas Instruments | — |
| LM5164DDAT | Texas Instruments | — |
Other Switching Regulators (Buck)
- TPS54302 – Texas Instruments, Synchronous Step-Down Converter
- MAX20730 – Analog Devices, Synchronous Switching Regulator
- TLV62568 – Texas Instruments, Synchronous Buck Converter
- 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)
Ask your AI agent about the LM5164DDAR
Connect SheetsData to Claude, Cursor, Codex or any MCP client and your agent reads this datasheet for you: pinout, limits, register maps and design checks, with the numbers taken from the PDF.
claude mcp add --transport http sheetsdata https://mcp.sheetsdata.com/mcp
Then ask: "Can the LM5164DDAR run from my 12 V rail? Check it against the datasheet limits."
Create a free account $2 of usage every month, no card needed.