Specifications
| Type | Description |
|---|---|
| Part Number | LM5156 |
| Manufacturer | Texas Instruments |
| Product Type | LDO Regulator |
| Category | Power Management |
| Component Type | Power_IC |
| Package / Case | 12-pin WSON (DSS), 3.00 mm x 2.00 mm nominal body |
| Topology Support | Boost, SEPIC, flyback; condition: peak current-mode control controller |
| Operating Input Voltage Range | 3.5 V to 60 V; condition: wide input operating range, BIAS supplied through internal VCC regulator |
| Operating Input Voltage Range | 2.97 V to 16 V; condition: BIAS = VCC |
| Minimum Boost Supply Voltage | 1.5 V; condition: BIAS >= 3.5 V |
| Input Transient Protection | Up to 65 V; condition: BIAS absolute maximum/input transient protection |
| Shutdown Current | <= 2.6 uA; condition: low shutdown current feature |
| Operating Current | <= 490 uA; condition: low operating current feature |
| Maximum Switching Frequency | 2.2 MHz; condition: programmable switching frequency range upper limit |
| Switching Frequency Range | 100 kHz to 2.2 MHz; condition: external RT resistor programming |
| Current Limit Threshold | 100 mV +/-7%; condition: accurate current-limit threshold |
| MOSFET Driver Peak Current | 1.5 A; condition: standard N-channel MOSFET gate driver |
| Feedback Reference Accuracy | +/-1%; condition: internal feedback reference |
| Internal Reference | 1 V; condition: LM5156 and LM51561 device options |
| Hiccup Mode Protection | Disabled; condition: LM5156 device option |
| Hiccup Mode Protection | Enabled; condition: LM51561 device option |
| BIAS Absolute Maximum Voltage | -0.3 V to 65 V; condition: BIAS to GND, over recommended operating junction temperature range |
| UVLO Absolute Maximum Voltage | -0.3 V to VBIAS + 0.3 V; condition: UVLO to GND |
| SS Absolute Maximum Voltage | -0.3 V to 3.8 V; condition: SS to GND, external voltage not specified |
| RT Absolute Maximum Voltage | -0.3 V to 3.8 V; condition: RT to GND, external voltage not specified |
| FB Absolute Maximum Voltage | -0.3 V to 4.0 V; condition: FB to GND |
| CS Absolute Maximum Voltage | -0.3 V to 0.3 V; condition: CS to GND, DC |
| CS Transient Absolute Maximum Voltage | -1 V; condition: CS to GND, 50 ns transient |
| DITHOFF Absolute Maximum Voltage | -0.3 V to 18 V; condition: DITHOFF to GND |
| VCC Absolute Maximum Voltage | -0.3 V to 18 V; condition: VCC to GND, 18 V or VBIAS + 0.3 V, whichever is lower |
| GATE Transient Absolute Maximum Voltage | -1 V; condition: GATE to GND, 50 ns transient |
| PGOOD Absolute Maximum Voltage | -0.3 V to 18 V; condition: PGOOD to GND, maximum sink current limited to 1 mA when VPGOOD > VBIAS |
| Junction Temperature Absolute Maximum | -40°C to 150°C; condition: TJ, operating lifetime derated above 125°C |
| Storage Temperature | -55°C to 150°C; condition: Tstg |
| ESD Rating HBM | +/-2000 V; condition: human body model per ANSI/ESDA/JEDEC JS-001, all pins |
| ESD Rating CDM | +/-500 V; condition: charged device model per JEDEC JESD22-C101, all pins |
| Recommended BIAS Input Voltage | Min 2.97 V, Max 60 V; condition: over recommended operating junction temperature range |
| Recommended VCC Voltage | Min 2.97 V, Max 16 V; condition: VCC voltage, should be less than VBIAS + 0.3 V |
| Recommended DITHOFF Input Voltage | Min 0 V, Max 16 V; condition: over recommended operating junction temperature range |
| Recommended UVLO Input Voltage | Min 0 V, Max 60 V; condition: over recommended operating junction temperature range |
| Recommended FB Input Voltage | Min 0 V, Max 4.0 V; condition: over recommended operating junction temperature range |
| Recommended Switching Frequency | Min 100 kHz, Max 2200 kHz; condition: typical switching frequency |
| Synchronization Pulse Frequency | Min 100 kHz, Max 2200 kHz; condition: external synchronization |
| Operating Junction Temperature | Min -40°C, Max 125°C; condition: recommended operating conditions |
| Junction-to-Ambient Thermal Resistance | 41.5°C/W; condition: LM5156EVM-BST, DSS WSON 12-pin package |
| Junction-to-Ambient Thermal Resistance | 63.1°C/W; condition: DSS WSON 12-pin package |
| Junction-to-Case Top Thermal Resistance | 62.4°C/W; condition: DSS WSON 12-pin package |
| Junction-to-Board Thermal Resistance | 31.6°C/W; condition: DSS WSON 12-pin package |
| Junction-to-Case Bottom Thermal Resistance | 10.7°C/W; condition: DSS WSON 12-pin package |
| BIAS Shutdown Current | Typ 2.6 uA, Max 5 uA; condition: VBIAS = 12 V, VUVLO = 0 V |
| BIAS Operating Current | Typ 490 uA, Max 550 uA; condition: VBIAS = 12 V, VUVLO = 2.0 V, VFB = VREF, RT = 220 kOhm |
| VCC Regulation | Min 6.5 V, Typ 6.85 V, Max 7 V; condition: VBIAS = 8 V, no load |
| VCC Regulation | Min 6.5 V; condition: VBIAS = 8 V, IVCC = 35 mA |
| VCC UVLO Rising Threshold | Min 2.75 V, Typ 2.85 V, Max 2.95 V; condition: VCC rising |
| VCC UVLO Hysteresis | Typ 0.063 V; condition: VCC falling |
| VCC Sourcing Current Limit | Min 35 mA, Typ 110 mA; condition: VBIAS = 10 V, VCC = 0 V |
| Enable Rising Threshold | Min 0.4 V, Typ 0.52 V, Max 0.7 V; condition: EN rising |
| Enable Falling Threshold | Min 0.33 V, Typ 0.49 V, Max 0.63 V; condition: EN falling |
| Enable Hysteresis | Typ 0.03 V; condition: EN falling |
| Datasheet Status | request_only |
Product Overview
The LM5156 is a Texas Instruments non-synchronous boost controller for Power_Management designs using peak current-mode control. The controller supports boost, SEPIC, and flyback power stages, making the topology information central to its use rather than a fixed single-output regulator claim.
Its BIAS operating range is 3.5 V to 60 V when supplied through the internal VCC regulator, while BIAS = VCC operation is specified from 2.97 V to 16 V. With BIAS at or above 3.5 V, the minimum boost supply voltage is 1.5 V. Input transient protection is specified up to 65 V, and the BIAS absolute maximum range is -0.3 V to 65 V.
Control and drive parameters include a 100 kHz to 2.2 MHz programmable switching-frequency range using an external RT resistor, 1.5 A peak current from the standard N-channel MOSFET gate driver, a 100 mV +/-7% current-limit threshold, and a 1 V internal reference with +/-1% feedback reference accuracy. The device is offered in a 12-pin WSON (DSS) package with a 3.00 mm x 2.00 mm nominal body.
Key Features
- Supports boost, SEPIC, and flyback topologies
- Peak current-mode control controller architecture
- 3.5 V to 60 V BIAS operating range
- 1.5 V minimum boost supply with BIAS >= 3.5 V
- 100 kHz to 2.2 MHz RT-programmed switching frequency
- 1.5 A N-channel MOSFET gate driver
- 100 mV +/-7% current-limit threshold
- 1 V internal reference with +/-1% feedback accuracy
- Shutdown current specified at <= 2.6 uA
- Operating current specified at <= 490 uA
Typical Applications
- Boost converter controllers
- SEPIC power stages
- Flyback power stages
- Wide-input power conversion
- Externally synchronized converters
- Low shutdown-current supplies
- N-channel MOSFET driven power stages
Procurement Notes
When requesting a quote for LM5156, 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 topologies does the LM5156 support?
The LM5156 supports boost, SEPIC, and flyback topologies. The extracted datasheet facts describe it as a peak current-mode control controller, so these topology claims apply to controller-based power-stage designs.
What input voltage range is specified for LM5156 operation?
The operating input range is 3.5 V to 60 V when BIAS is supplied through the internal VCC regulator. A separate operating range of 2.97 V to 16 V is specified when BIAS equals VCC.
What switching-frequency range can the LM5156 use?
The LM5156 switching frequency is programmable from 100 kHz to 2.2 MHz using an external RT resistor. The same 100 kHz to 2200 kHz range is also listed for recommended switching frequency and synchronization pulse frequency.
What package is specified for the LM5156?
The listed package is a 12-pin WSON, Texas Instruments DSS package, with a 3.00 mm x 2.00 mm nominal body. Thermal resistance values are also specified for the DSS WSON 12-pin package.
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.