LM5069MM-2/NOPB - 80V Hot Swap Controller w/ Power Limit | TI
MPN: LM5069MM-2/NOPB ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.45 | $34.50 |
| 100 | $2.92 | $292.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.18 | $2,180.00 |
| 2,500 | $1.92 | $4,800.00 |
LM5069MM-2/NOPB Overview
What is a hot-swap controller? A hot-swap controller is a power-management IC that allows a circuit board to be inserted into a live backplane without drawing inrush currents large enough to damage connectors, blow fuses, or collapse the upstream rail. It drives an external N-channel MOSFET in the high-side path and combines programmable inrush current limiting, power limiting, undervoltage/overvoltage lockout, and a fault timer. Hot-swap controllers belong to the wider power-management hierarchy: hot-swap controller -> hot-swap & power distribution -> power management IC -> semiconductor.
Key features include programmable current limit set by an external sense resistor, a 0.7-ms internal fault timer that distinguishes inrush from sustained fault, independent OV/UV thresholds with hysteresis, a power-good indicator, and a board-insertion delay. The DGS VSSOP package occupies roughly the same board area as a 10-pin MSOP while providing enhanced thermal performance for the dissipation levels encountered in -48V telecom and 24V industrial rails.
The device uses a transconductance control loop with a dv/dt circuit on GATE, charging the MOSFET gate with a programmable current source to ensure monotonic rail ramp. Power limiting is implemented by measuring the voltage across the sense resistor multiplied by VIN, giving a true input-power limit rather than a simple current foldback, which protects the upstream supply during capacitive or short-circuit events. The LM5069-2 auto-restart behavior retries every 220 ms (typical) after a fault, ideal for transient overload recovery.
Typical applications include -48V telecom plug-in cards, 24V/48V industrial automation modules, blade servers and ATCA front-end boards, battery exchange modules in UPS systems, and PoE midspan power insertion. The wide 80V input range also tolerates load-dump transients on 24V automotive and heavy-industrial buses.
A design consideration worth highlighting: the LM5069MM-2/NOPB differs from the LM5069MM-1 by auto-restart rather than latch-off after faults. Selection should reflect whether the system requires operator intervention (latch) or unattended recovery (auto-restart). PCB layout should keep the sense-resistor trace short and Kelvin-connected to the CS pin to avoid ground bounce from corrupting the current measurement.
This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the manufacturer datasheet alone, including a head-to-head comparison with the LM5069MM-1 and TPS2490DGS in the same VSSOP-10 footprint.
Drop-in alternatives for LM5069MM-2/NOPB — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LM5069MM-2/NOPB (same form factor and footprint) — differing in Function, MSL Level.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LM5069MM-1/NOPB
✅ Drop-In✓ In Stock
$2.21 / Unit
View Datasheet →LM5069MMX-2/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
LM5069MMX-1/NOPB
✅ Drop-In📋 Reference alternative (not in catalog)
LM5069MM-2
✅ Drop-In📋 Reference alternative (not in catalog)
TPS2490DGS
✅ Drop-In📋 Reference alternative (not in catalog)
LM5069MM-2/NOPB Specifications
| Function | Hot Swap Controller, High-Side, Positive Voltage |
| Number of Channels | 1 |
| Input Voltage Range | 9 V to 80 V |
| Internal Switch | No (external N-channel MOSFET required) |
| Current Limit Type | Programmable via external sense resistor (with power limiting) |
| Fault Behavior (suffix) | -2 = auto-restart at fixed duty cycle; -1 = latched off |
| Fault Timer | Programmable via external capacitor |
| Undervoltage Lockout | Programmable with external resistor divider |
| Overvoltage Lockout | Programmable with external resistor divider |
| Power Good Output | Yes, open-drain PGOOD pin |
| Operating Temperature Range | -40 C to +125 C |
| Package | 10-VSSOP (DGS), 3.0 mm body |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited) |
| RoHS / Lead-Free Status | RoHS compliant, lead-free (NOPB suffix) |
LM5069MM-2/NOPB Pin Configuration
| Pin 1 | VIN — Input supply voltage, 9 V to 80 V |
| Pin 2 | VOUT — Output voltage sense (after MOSFET) |
| Pin 3 | SENSE — Kelvin connection to top of external current-sense resistor |
| Pin 4 | CS — Kelvin connection to bottom of external current-sense resistor |
| Pin 5 | GND — Ground reference |
| Pin 6 | PGOOD — Open-drain power-good output |
| Pin 7 | OVLO — Overvoltage lockout programming input |
| Pin 8 | UVLO — Undervoltage lockout programming input |
| Pin 9 | TIMER — Fault timer capacitor connection |
| Pin 10 | GATE — Gate drive output for external N-channel MOSFET |
Typical Applications
LM5069MM-2/NOPB is suitable for 6 applications: -48V Telecom Hot Swap Card, 24V Industrial PLC I/O Module, ATCA / Blade Server Front-End, Battery Exchange in UPS / Storage Systems, PoE Midspan / Power-Insertion Equipment, Automotive 24V Heavy-Equipment ECU.
-48V Telecom Hot Swap Card
The LM5069MM-2/NOPB is a textbook fit for -48V telecom plug-in modules where the upstream bus cannot tolerate inrush above the standard 4A steady-state limit. Its 80V absolute-max input comfortably covers the -75V transient envelope of ETSI/NEBS telecom feeds, while true input power limiting protects the central battery plant from capacitive charge surges. Place a 100V-rated N-channel MOSFET in the high-side path with a Kelvin-connected 5 milliohm sense resistor and set fault timer to 1 ms via a 470 pF capacitor, then connect the LM5069's GATE to the MOSFET gate to drive monotonic VOUT ramp. The auto-restart -2 suffix recovers automatically after a transient short, reducing remote-site truck rolls.
Recommended
24V Industrial PLC I/O Module
In 24V industrial PLC and distributed I/O modules, the LM5069MM-2/NOPB protects field-wiring faults by limiting inrush to a programmable value while tolerating the 36V Class-2 industrial transient envelope. Program UVLO to ~18V to ride out brownout and OVLO to ~32V for load-dump tolerance, then drive an external 60V SOA-rated MOSFET. Power limiting distinguishes capacitive load (charged gracefully) from a sustained short (folded back into thermal protection). The 10-VSSOP footprint is narrow enough to mount beside the field-connector, and the open-drain PGOOD pin interfaces directly to the host MCU for system-level diagnostics.
Recommended
ATCA / Blade Server Front-End
The LM5069MM-2/NOPB is well-suited to AdvancedTCA and proprietary blade-server front-end cards where the 48V backplane must see less than 1A inrush per slot during insertion. With a 10 milliohm sense resistor the controller holds inrush below 5A and imposes a dv/dt ramp via the programmable gate-charge current, eliminating the need for bulky pre-charge circuits. Auto-restart behavior recovers from temporary overloads (e.g., hot-swap of a downstream daughter-card) without operator intervention, important in unattended data-center aisles. PGOOD drives the IPMC signal chain to flag healthy insertion to the shelf manager.
Recommended
Battery Exchange in UPS / Storage Systems
Battery exchange modules in UPS, telecom backup, and grid-storage systems use the LM5069MM-2/NOPB to precharge the DC bus capacitor before connecting the battery stack, avoiding hundreds-of-amps inrush that weld relay contacts. The 9-80V input range covers both 24V and 48V battery configurations, and true input power limiting prevents the discharge bus from sagging when a deeply discharged stack is first connected. Program the fault timer to ~100 ms to distinguish legitimate precharge (sub-second) from a shorted battery, and auto-restart retries precharge on its own. For large Li-ion packs, the FW will reset itself on overcurrent rather than requiring manual maintenance.
Recommended
PoE Midspan / Power-Insertion Equipment
Power-over-Ethernet midspans and DC-power inserters benefit from the LM5069MM-2/NOPB's small VSSOP footprint and tight current limit when inserting a powered device into a live 48V phantom feed. The controller's programmable OV/UV thresholds can reject cable-induced transient noise on the Cat5e/Cat6 pairs, while PGOOD signals the PD detection handshake to the management controller. Use a low-Rds(on) 60V MOSFET such that continuous load current at 802.3at Class-4 (30W) produces less than 1W of dissipation in the pass element. The 10-pin footprint is smaller than legacy DPAK-based hot-swap solutions.
Recommended
Automotive 24V Heavy-Equipment ECU
The LM5069MM-2/NOPB can serve in heavy-truck and off-highway 24V ECUs where load-dump events push rail transients to 36V steady-state. The 80V absolute max absorbs ISO 7637-2 pulses that would destroy unprotected electronics, while programmable UV/OV thresholds reject under-voltage cranking and over-voltage load-dump excursions. Pair the controller with a 60V N-channel MOSFET in DFN-8 and a 5 milliohm Kelvin sense resistor to build a rugged in-line fuse replacement. Auto-restart (-2) recovers when the load-dump clears, eliminating the need for service reset on intermittent transient events.
Recommended
Recommended Products Summary
Engineering reference data for LM5069MM-2/NOPB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM5069MM-1/NOPB | LM5069MMX-2/NOPB | LM5069MMX-1/NOPB | LM5069MM-2 | TPS2490DGS |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 10-VSSOP (DGS) | 10-VSSOP (DGS) - same | 10-VSSOP (DGS) - same | 10-VSSOP (DGS) - same | 10-VSSOP (DGS) - same | 10-VSSOP (DGS) - same |
| Input Voltage Range | 9 V to 80 V | 9 V to 80 V | 9 V to 80 V | 9 V to 80 V | 9 V to 80 V | 9 V to 26 V |
| Fault Behavior | Auto-restart at fixed duty cycle | Latched off | Auto-restart | Latched off | Auto-restart | Programmable |
| Power Limiting | Yes (true input power limit) | Yes | Yes | Yes | Yes | Programmable power limit |
| Lead-Free / RoHS | Yes (NOPB) | Yes (NOPB) | Yes (NOPB) | Yes (NOPB) | No (legacy Pb finish) | Yes |
| Reel Quantity | 1000 | 1000 | 3000 | 3000 | 1000 | 2500 |
| PGOOD Output | Yes (open-drain) | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- True input power limiting, not just current foldback (vs LM5060Q1MM/NOPB)
- Auto-restart vs latch-off fault philosophy (vs LM5069MM-1/NOPB)
- 80 V absolute-maximum input vs 26 V on TPS2490 (vs TPS2490DGS)
Design Notes
Use a true Kelvin (4-wire) connection from the CS and SENSE pins to the current-sense resistor. Route the two CS traces tightly together as a differential pair away from the GATE switching node to avoid ground bounce and dv/dt coupling corrupting the current measurement. The TI LM5069 datasheet application section shows the reference layout.
Choose the external N-channel MOSFET with SOA margin to handle (VIN - VOUT) * ILIM during the fault timer. Estimated: at VIN = 48 V, ILIM = 5 A, fault duration 1 ms, the MOSFET must survive 240 W pulsed dissipation. A 100 V-rated MOSFET in DFN-8 with RthJA under 50 C/W is recommended. Add a TVS across the drain to source for inductive kick protection.
Do not omit the gate-to-source resistor on the external MOSFET; without it the LM5069's dv/dt control loop can mis-trigger on power-up. Use 100 kOhm as a starting value. Also ensure the TIMER capacitor has a low-leakage dielectric (COG/NPO or film) - an X7R ceramic with 20% tolerance can shift the fault window by tens of milliseconds.
Estimated: the LM5069MM-2/NOPB's VSSOP-10 dissipates approximately 0.5 W at full PGOOD sink current into a 1 square inch copper pour. With the 10-pin VSSOP RthJA of approximately 100 C/W mounted on JEDEC 4-layer test board, the junction rises 50 C above ambient at 0.5 W, which is within the 150 C maximum at 25 C ambient. Provide at least 100 mm squared of copper area on each layer for reliable operation.
Compliance Information
RoHS compliant per /NOPB suffix and TI product page. Not AEC-Q100 qualified; choose LM5060Q1MM/NOPB for automotive applications. Lead-free and halogen-free per the TI material declaration.
