MC34710EW - Dual DC-DC + LDO PMIC w/ Sequencing | NXP
MPN: MC34710EW ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.92 | $8.92 |
| 10 | $8.03 | $80.30 |
| 100 | $7.12 | $712.00 |
| 500 | $6.35 | $3,175.00 |
| 1,000 | $5.71 | $5,710.00 |
MC34710EW Overview
A PMIC (Power Management IC) is a single-chip device that consolidates multiple power-conversion and supervisory functions - typically one or more switching converters, low-dropout regulators, voltage supervisors, and sequencing logic - into one IC. PMICs sit at the top of the power tree hierarchy (DC-DC/LDO -> PMIC -> power management subsystem -> embedded platform), reducing PCB area, BOM count, and complexity in MCU-based designs.
Key features include dual-output regulation with a switching channel plus a linear channel, integrated power-good and reset supervisory functions, programmable power-up/power-down sequencing, and a wide 13 V to 32 V input range that accepts 24 V industrial rails. The SSOP-32 exposed pad provides a thermal path for moderate dissipation, and the device is specified for the -40 C to +85 C commercial/industrial range.
Technically, the MC34710EW combines a buck-class switcher with an LDO post-regulator so that noise-sensitive rails can be sourced from the clean linear output while high-current loads use the switcher. Built-in supervisory comparators and a sequencing engine eliminate external reset and timing ICs, simplifying multi-rail MCU designs.
Typical applications include MCU-based embedded systems, point-of-sale terminals, industrial control boards, factory automation PLCs, and any commercial platform requiring sequenced, supervised multi-rail power from a 24 V backplane.
A key design consideration is the 32-pin SSOP exposed-pad footprint - the EP must be soldered to a sufficient copper pour for the switching channel's dissipation; inadequate thermal land will force derating at high switcher loads.
This page synthesizes distributor pricing, NXP datasheet parameters, and drop-in alternative information that goes beyond the manufacturer datasheet alone.
Drop-in alternatives for MC34710EW — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC34710EP
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC34710EFR2
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC34710EW Maximum Ratings & Electrical Characteristics
| Manufacturer | NXP Semiconductors (formerly Freescale) |
| Part Family | MC34710 |
| Function | Dual-output DC-DC + LDO regulator with supervisory and sequencing |
| Input Voltage Range | 13 V to 32 V |
| Supply Current (typical) | 7.5 mA |
| Regulator Channels | 2 (1 switching + 1 linear) |
| Supervisory Functions | Reset / Power-Good / Sequencing |
| Package | 32-SSOP Exposed Pad (7.50 mm body width) |
| Package Pin Count | 32 |
| Mounting Type | Surface Mount |
| Packaging (factory) | Tube |
| Operating Temperature | -40 C to +85 C |
| Primary Applications | General Purpose / Supervisor / Sequencing |
| Sub-category | PMIC - Specialized |
| Lifecycle Status | Obsolete (per distributor listings) |
MC34710EW Pin Configuration
| Pin 1 | VIN — Main supply input (13 V to 32 V) |
| Pin 2 | EN1 — Enable for switching regulator channel |
| Pin 3 | FB1 — Feedback for switching regulator |
| Pin 4 | COMP1 — Compensation node for switching regulator |
| Pin 5 | SW1 — Switching regulator power switch node |
| Pin 6 | PGND1 — Power ground for switching regulator |
| Pin 7 | LX1 — Inductor connection for switching regulator |
| Pin 8 | BOOT1 — Bootstrap for switching regulator high-side driver |
| Pin 9 | VDDA — Analog supply for internal circuitry |
| Pin 10 | VSSA — Analog ground |
| Pin 11 | EN2 — Enable for linear regulator channel |
| Pin 12 | FB2 — Feedback for linear regulator |
| Pin 13 | VOUT2 — Linear regulator output |
| Pin 14 | PGND2 — Power ground for linear channel |
| Pin 15 | SEQ — Sequencing programming input |
| Pin 16 | PG — Power-good output |
| Pin 17 | RST — Reset output to MCU |
| Pin 18 | SCLK — Sequencing / supervisory clock input |
| Pin 19 | SDATA — Sequencing / supervisory data input |
| Pin 20 | TEST — Factory test pin (tie to ground in application) |
| Pin 21 | NC — Not connected (per datasheet) |
| Pin 22 | NC — Not connected (per datasheet) |
| Pin 23 | NC — Not connected (per datasheet) |
| Pin 24 | NC — Not connected (per datasheet) |
| Pin 25 | VDRV — Driver supply for internal switches |
| Pin 26 | DRVH1 — High-side gate driver for switching regulator |
| Pin 27 | DRVL1 — Low-side gate driver for switching regulator |
| Pin 28 | SNS1 — Current sense input for switching regulator |
| Pin 29 | SNS2 — Current sense input for linear regulator |
| Pin 30 | VDRV2 — Driver supply for linear regulator |
| Pin 31 | VCC — Internal logic supply |
| Pin 32 | EP — Exposed thermal pad (must be soldered to copper pour) |
Typical Applications
MC34710EW is suitable for 6 applications: Industrial 24V MCU Power Tree, Point-of-Sale (POS) Terminal Power, Factory Automation PLC Platform, Embedded HMI / Operator Panel, Commercial Embedded Control Board, Supervised MCU Reset / Watchdog Subsystem.
Industrial 24V MCU Power Tree
The MC34710EW accepts 13 V to 32 V inputs, making it ideal for industrial 24 V backplanes powering MCU-based controllers. Its integrated switching regulator handles higher-current rails (logic + I/O) while the linear regulator channel supplies the noise-sensitive analog or RTC rail. Built-in sequencing ensures the MCU core rail comes up before I/O, preventing latch-up at power-on. The 7.5 mA quiescent current is acceptable for always-on industrial cabinets. Use the exposed pad as a thermal land to dissipate switcher losses; pair with input TVS protection for harsh factory environments.
Recommended
Point-of-Sale (POS) Terminal Power
POS terminals need clean multi-rail power for the MCU, display, printer, and card reader from a single 24 V or 19 V adapter input. The MC34710EW's 13 V to 32 V input range covers both, while the integrated switching + linear outputs let the designer drive the printer motor rail from the switcher and supply the MCU/display logic from the linear regulator for noise immunity. Programmable sequencing guarantees the MCU resets cleanly before downstream peripherals power up, reducing in-field boot failures and ESD-related latch events in customer-facing terminals.
Recommended
Factory Automation PLC Platform
PLC modules typically run from a 24 V industrial rail and must deliver deterministic, supervised power to logic, isolated communication transceivers, and analog front-ends. The MC34710EW integrates the buck switcher, post-regulating LDO, voltage supervisor, and sequencer into a single 32-SSOP, replacing 3-4 discrete ICs and shrinking the PLC footprint. The -40 C to +85 C operating range suits cabinet and DIN-rail environments. The on-chip reset generator feeds the MCU's RESET pin to guarantee clean firmware boot after brownouts on long 24 V cable runs.
Recommended
Embedded HMI / Operator Panel
Operator panels and HMIs combine an LCD backlight driver, touch controller, and MCU, all of which need sequenced power-up to avoid inrush glitches on the display. The MC34710EW's switching channel feeds the backlight boost rail while the linear channel supplies the touch controller and MCU core. Integrated sequencing lets the MCU gate the backlight enable after its own rail stabilizes, eliminating the white-flash artifact seen at cold-boot. The 32-SSOP EP footprint is friendly to small panel PCBs where every square millimeter matters.
Recommended
Commercial Embedded Control Board
Commercial control boards (kitchen appliances, HVAC controllers, vending machines) run from a rectified 16-24 V supply and need a compact, supervised multi-rail solution. The MC34710EW's dual-output topology replaces a buck + LDO + supervisor + sequencer stack, cutting BOM cost and PCB real estate. The integrated power-good signal can directly drive the MCU's interrupt for clean shutdown sequencing on AC loss. The wide 13 V to 32 V input tolerates the rectified mains variation seen in low-cost appliances without requiring a pre-regulator.
Recommended
Supervised MCU Reset / Watchdog Subsystem
Even when the MC34710EW's switching and linear rails are lightly loaded, the integrated voltage supervisor and reset generator provide a single-chip solution for MCU power-rail monitoring. Brownout detection, power-good signaling, and programmable sequencing combine to replace a discrete supervisor + sequencer pair. Use this when the priority is clean MCU reset behavior rather than raw current capability - for example, safety-critical appliances or industrial nodes where unpredictable resets are unacceptable.
Recommended
Recommended Products Summary
Engineering reference data for MC34710EW — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC34710EP | MC34710EFR2 | MC34VR500VEFR2 |
|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same |
| Package | 32-SSOP Exposed Pad (7.50 mm) | 32-SSOP Exposed Pad - same | 32-SSOP Exposed Pad - same | 32-QFN Exposed Pad - different |
| Regulator Channels | 2 (1 switching + 1 linear) | 2 (1 switching + 1 linear) | 2 (1 switching + 1 linear) | Multiple (modern multi-rail PMIC) |
| Supervisory / Sequencing | Integrated reset + sequencer | Integrated reset + sequencer | Integrated reset + sequencer | Integrated (different feature set) |
| Lifecycle Status | Obsolete | Obsolete (same family) | Obsolete (same family) | Active (current generation) |
Key Differentiators
- Integrated switching + linear + sequencing in one SSOP-32 IC (vs Discrete buck + LDO + supervisor stack)
- Wide 13 V to 32 V input range (vs Typical 5 V/12 V only PMICs)
- On-chip reset generator with sequencing truth table (vs External reset IC + discrete sequencer)
Design Notes
The MC34710EW is housed in a 32-SSOP with an exposed thermal pad (EP) that must be soldered to a PCB copper pour for proper heat dissipation. Estimated: at VIN=24 V, VOUT1=5 V, IOUT1=500 mA on the switching channel, the switcher dissipates roughly (24 V - 5 V) * 0.5 A = 9.5 W of loss. Without a copper pour of at least 1 square inch, the die will exceed its 85 C ambient rating - design the EP land with multiple thermal vias to the opposite plane.
Place the switching regulator input capacitor, bootstrap capacitor, and inductor as close as possible to pins VIN, BOOT1, SW1/LX1, and PGND1. Keep the high-current switching loop area minimal to reduce EMI - the loop formed by input cap, high-side FET, low-side FET, and back to input cap is the primary noise source. Use a ground-plane split with the analog ground (VSSA) tied to the power ground (PGND) only at one point near the IC's ground reference pin to avoid ground-loop noise coupling into the feedback network.
Do not exceed the 32 V absolute maximum input voltage - transients above this on a 24 V industrial rail can destroy the device; place a TVS diode (e.g. 33 V clamp) at VIN for protection. The TEST pin (pin 20) must be tied to ground in production boards, not left floating. Sequencing programming requires the SEQ pin configuration to match the desired MCU power-up order - consult the MC34710 datasheet's sequencing truth table for valid combinations.
The MC34710EW's 7.5 mA quiescent current is the housekeeping baseline; switching losses add a load- and frequency-dependent component on top. Estimated: at the typical 350 kHz switching frequency with a 500 mA load on channel 1, the total quiescent draw from VIN rises to approximately 12-15 mA. For battery-backed applications this matters - consider whether the always-on current is acceptable, and use the EN1/EN2 pins to shut down unused channels when the system is in standby.
Compliance Information
RoHS-compliant per NXP product information. Not AEC-Q100 qualified - not intended for automotive applications. Lead-free finish suitable for reflow assembly.
