Specifications
| Type | Description |
|---|---|
| Part Number | LM5170 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package / Case | TQFP (48), PHP package, 7.00 mm × 7.00 mm body size nominal |
| High-voltage port maximum rating | 100 V |
| Low-voltage port maximum rating | 65 V |
| Bidirectional current regulation accuracy | 1% |
| Channel current monitoring accuracy | 1% |
| Gate driver peak current | 5 A peak |
| Output power capability per channel | 500 W or more |
| Oscillator frequency range | Adjustable up to 500 kHz |
| Operating mode direction control | DIR input selects current direction |
| Current command input types | Analog or digital PWM inputs |
| Number of converter channels | 2 channels |
| Multiphase operation support | 3-phase or 4-phase with two LM5170 controllers; higher phase count with phase-shifted clocks |
| Diode emulation function | Prevents negative current |
| Light-load operating mode | Discontinuous mode operation supported |
| UVLO shutdown threshold | Below 1.25 V |
| UVLO initialization range | Above 1.25 V and below 2.5 V |
| UVLO startup threshold | Above 2.5 V |
| nFAULT initialization pullup voltage | 5 V |
| OVPA threshold | 1.185 V |
| OVPA internal pullup resistance | 3 MΩ |
| OVPB threshold | 1.185 V |
| OVPB internal pullup resistance | 1 MΩ |
| VCC bias supply voltage | 9 V to 12 V |
| Soft-start current source | 25 µA |
| Circuit breaker gate charge current | 330 µA |
| Circuit breaker gate clamp voltage | 12 V |
| Circuit breaker disabled BRKS resistor | 20 kΩ |
| VCCA series resistor | 25 Ω |
| IOUT offset current source | 25 µA |
| VIN internal current source | 330 µA |
| PWM ramp generator supply | VINX |
| Datasheet Status | request_only |
Product Overview
The LM5170 is a Texas Instruments multiphase bidirectional current controller in the Power_Management category. It regulates average current between high-voltage and low-voltage ports, with the DIR input selecting current direction and analog or digital PWM inputs programming the current regulation level. The device supports 1% bidirectional current regulation accuracy and 1% dual-channel current monitoring accuracy.
The controller has two converter channels and half-bridge gate drivers rated for 5 A peak drive current. With parallel MOSFET switches, each channel can support 500 W or more. The internal oscillator is adjustable up to 500 kHz and can be synchronized to an external clock. Two LM5170 controllers support 3-phase or 4-phase operation, while higher phase counts are supported with phase-shifted clocks.
Protection and startup functions include UVLO thresholds, OVPA and OVPB comparators, soft-start current sourcing, circuit breaker gate drive control, and diode emulation to prevent negative current. The device is offered in a TQFP (48) PHP package with a 7.00 mm × 7.00 mm nominal body size.
Key Features
- 100 V high-voltage port maximum rating
- 65 V low-voltage port maximum rating
- 1% average bidirectional current regulation accuracy
- 1% dual-channel current monitor accuracy
- 5 A peak half-bridge gate drivers
- Two converter channels for bidirectional control
- Adjustable oscillator operation up to 500 kHz
- DIR input selects average current direction
- Analog or digital PWM current command inputs
- Diode emulation prevents negative current
- Discontinuous mode operation supports light-load efficiency
- 3-phase or 4-phase operation with two controllers
Typical Applications
- Bidirectional HV-LV power conversion
- Multiphase current-controlled converters
- Dual-channel power stages
- Parallel MOSFET converter channels
- Light-load discontinuous mode systems
- Externally synchronized power controllers
- Circuit breaker controlled power paths
Procurement Notes
When requesting a quote for LM5170, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For power IC and power device sourcing, voltage rating, current rating, power dissipation, package thermal performance, protection features, qualification grade and application conditions should be reviewed before approval.
FAQ
What type of controller is the LM5170?
The LM5170 is a Texas Instruments multiphase bidirectional current controller for Power_Management designs. It controls average current flow between high-voltage and low-voltage ports using two converter channels.
What voltage ratings are specified for the LM5170 ports?
The extracted datasheet facts specify a 100 V maximum rating for the high-voltage port and a 65 V maximum rating for the low-voltage port.
How is current direction controlled on the LM5170?
Current direction is selected through the DIR input. The current regulation level can be programmed with analog inputs or digital PWM inputs, according to the extracted device facts.
What package is used for the LM5170?
The LM5170 is listed in a TQFP (48), PHP package with a nominal 7.00 mm × 7.00 mm body size.
Does the LM5170 support multiphase operation?
Yes. Two LM5170 controllers can support 3-phase or 4-phase operation, and higher phase counts are supported by using phase-shifted clocks.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.