SP6134EBMAX2A - 2A Sync Buck Controller | MaxLinear
MPN: SP6134EBMAX2A ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $75 | $75.00 |
| 10 | $67.5 | $675.00 |
| 50 | $60 | $3,000.00 |
| 100 | $52.5 | $5,250.00 |
| 250 | $47.5 | $11,875.00 |
SP6134EBMAX2A Overview
A buck controller is a type of switched-mode DC-DC converter controller that uses an external high-side and low-side MOSFET pair to step down a higher input voltage to a lower regulated output voltage. Buck controllers sit one level below fully integrated synchronous buck regulators and are preferred when high current (>2 A), high efficiency, or thermal separation between the IC and the power stage is required. Within the MaxLinear power management hierarchy, the SP6134H belongs to the SP613x family of synchronous buck controllers targeting distributed power architectures in networking, telecom, and industrial systems.
Key features include 2 A continuous load capability, wide 3 V to 15 V input voltage operating range, output adjustable from 0.8 V up to near-VIN via external resistor divider, internal high-bandwidth error amplifier for tight line and load regulation, and dual N-channel MOSFET synchronous drive for high efficiency. The evaluation board manual specifies that with R1 = 68.1 kOhm and a 0.80 V output setting, R2 can simply be removed from the board. Designers are advised to keep R1 within 50 kOhm to 100 kOhm to maintain overall system loop stability.
Typical applications include point-of-load conversion from 3.3 V, 5 V, 9.6 V, or 12 V standard rails to lower core voltages, FPGA and ASIC auxiliary supplies, telecom card voltage regulation, and industrial 12 V bus distributed power. The SP6134EB is frequently used as a reference design template to accelerate customer bring-up of the SP6134H in production boards.
When designing with this board, connect the input supply using short, large-diameter leads directly to the VIN and GND posts to minimize voltage drop and inductive ringing. Apply the load between VOUT and GND2 with equally short leads to preserve measurement accuracy and avoid parasitic inductance that can degrade the control loop.
Drop-in alternatives for SP6134EBMAX2A — 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 SP6134EBMAX2A (same form factor and footprint) — differing in Mounting Type, Topology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SP6134H
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →SP6133
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SP6135
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
SP6134EB
✅ Drop-In📋 Reference alternative (not in catalog)
SP6134EBMAX
✅ Drop-In📋 Reference alternative (not in catalog)
SP6134EBMAX2A Maximum Ratings & Electrical Characteristics
| Part Type | Evaluation Board (for SP6134H controller) |
| Target IC | SP6134H Synchronous Buck Controller |
| Maximum Output Current | 2 A |
| Input Voltage Range | 3 V to 15 V |
| Default Input Voltage (Board) | 12 V |
| Default Output Voltage (Board) | 3.30 V |
| Adjustable Output Voltage Range | 0.8 V to near-VIN |
| Output Voltage Setting Resistor (R1) | 68.1 kOhm (default on board) |
| R1 Stability Range | 50 kOhm to 100 kOhm |
| Output Voltage Setting | 0.80 V when R2 removed |
| MOSFET Drive | Synchronous, dual N-channel |
| Topology | Synchronous buck (step-down) |
| Error Amplifier | Internal wide-bandwidth |
| Operating Temperature | -40C to +85C (industrial, per SP6134H family) |
| Mounting Type | Bench / prototype (through-hole test posts) |
| Compliance | RoHS compliant (per distributor listing) |
SP6134EBMAX2A standard Pin Configuration Guide
Pin configuration for SP6134EBMAX2A (standard package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for SP6134EBMAX2A.
Refer to the datasheet for full pin configuration.
Typical Applications
SP6134EBMAX2A is suitable for 6 applications: 12V-to-3.3V Distributed Power, FPGA/ASIC Core Supply Reference, Industrial 24V-Bus Point-of-Load, Telecom Card Auxiliary Supply, Test & Measurement Instrumentation, Bench Characterization Platform for SP6134H.
12V-to-3.3V Distributed Power
The SP6134EBMAX2A ships pre-configured for 12 V to 3.3 V conversion at 2 A, making it a drop-in reference for distributed power in telecom and networking cards. With VIN = 12 V, VOUT = 3.3 V, and 2 A load, the controller achieves roughly 90 percent efficiency using the on-board synchronous N-channel MOSFETs and the SP6134H internal error amplifier. The wide 3 V-to-15 V input range also covers 5 V and 9.6 V rails without re-tooling.
Recommended
FPGA/ASIC Core Supply Reference
The SP6134EBMAX2A's 0.8 V adjustable output and 2 A load capability directly support FPGA and ASIC core rails that require sub-1 V supply from a 5 V or 12 V bus. With R1 = 68.1 kOhm and R2 removed, the board natively outputs 0.80 V; intermediate voltages are programmed by selecting R2 within the 50 kOhm-to-100 kOhm loop-stability window specified in the SP6134 Evaluation Board manual. Engineers can probe transient response at the VOUT test post with minimal lead inductance.
Recommended
Industrial 24V-Bus Point-of-Load
In industrial systems where the 24 V factory bus must be stepped down to 3.3 V or 5 V at the load, the SP6134EBMAX2A provides a pre-validated SP6134H reference design. The board's 15 V maximum input means a front-end preregulator (such as a 24 V-to-15 V LDO or wide-VIN buck) is required, but the SP6134H then handles the second stage with synchronous rectification for high efficiency. The wide-bandwidth internal error amplifier maintains tight line and load regulation even under step loads from motors or solenoids.
Recommended
Telecom Card Auxiliary Supply
Telecom line cards typically draw 1 A to 3 A at 3.3 V or 2.5 V from a -48 V or 12 V backplane, and the SP6134EBMAX2A evaluation board demonstrates the SP6134H synchronous buck topology suited for that role. With 2 A continuous capability and synchronous N-channel drive, the design achieves high efficiency and reduces thermal stress on the line card. The board's accessible VIN, GND, VOUT, and GND2 test posts allow direct oscilloscope probing of switching waveforms at the switching node.
Recommended
Test & Measurement Instrumentation
Bench-top test instruments and ATE systems often require multiple low-voltage rails derived from a 12 V or 15 V internal bus, and the SP6134EBMAX2A provides a working template for those rails. The 0.8 V-to-near-VIN output adjustability covers digital logic, FPGA, and analog ADC reference supplies from a single controller reference design. The evaluation board's standard test posts also let lab engineers measure ripple, load-step response, and start-up behavior with standard oscilloscope probes.
Recommended
Bench Characterization Platform for SP6134H
Beyond any single end product, the SP6134EBMAX2A is itself an evaluation platform intended to characterize the SP6134H controller's efficiency, loop stability, and thermal behavior. Engineers swap resistor dividers to re-target VOUT, change input supplies from 3.3 V to 15 V, and adjust load to map out performance before committing to a production PCB. The SP6134 Evaluation Board manual documents powering-up steps, lead-inductance minimization, and the 50 kOhm-to-100 kOhm loop-stability rule for R1.
Recommended
Recommended Products Summary
Engineering reference data for SP6134EBMAX2A — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SP6134H | SP6134EB | SP6133 | SP6135 |
|---|---|---|---|---|---|
| Brand | MaxLinear | MaxLinear (same) | MaxLinear (same) | MaxLinear (same) | MaxLinear (same) |
| Package | Evaluation Board (SP6134H controller + discrete power stage) | MSOP-10 (bare controller IC) | Evaluation Board (same form factor) | MSOP-10 (bare controller IC) | MSOP-10 (bare controller IC) |
| Input Voltage Range | 3 V to 15 V | 3 V to 15 V | 3 V to 15 V | 3 V to 15 V | 3 V to 15 V |
| Output Current | 2 A | 2 A | 2 A | 1 A | 4 A |
| Output Voltage Adjust Range | 0.8 V to near-VIN | 0.8 V to near-VIN | 0.8 V to near-VIN | 0.8 V to near-VIN | 0.8 V to near-VIN |
| Topology | Synchronous Buck | Synchronous Buck | Synchronous Buck | Synchronous Buck | Synchronous Buck |
| MOSFETs Included | Yes (discrete on board) | No (controller only) | Yes | No (controller only) | No (controller only) |
| Form Factor | Bench-ready eval board | Bare IC for SMT assembly | Bench-ready eval board | Bare IC for SMT assembly | Bare IC for SMT assembly |
| Datasheet Availability | Evaluation Board Manual + SP6134H datasheet | SP6134H datasheet only | Evaluation Board Manual | SP6133 datasheet | SP6135 datasheet |
Key Differentiators
- Pre-configured for 12 V-to-3.3 V conversion at 2 A out of the box (vs SP6134EB (no MAX2A tooling))
- Includes the assembled power stage, not just the controller IC (vs SP6134H (bare controller IC))
- 2 A load capability balances current and efficiency in a small form factor (vs SP6133 (1 A))
Design Notes
Use short, large-diameter leads between the external supply and the VIN/GND posts, and between the load and the VOUT/GND2 posts, as called out in the SP6134 Evaluation Board manual. Long leads introduce series inductance that can corrupt the switching-node waveform and cause the control loop to appear unstable. Estimated: at 500 kHz switching frequency, every 100 nH of lead inductance adds roughly 5 ohms of impedance at the fundamental, which is enough to destabilize a buck converter's current loop.
When porting the SP6134EBMAX2A reference design to a custom PCB, place the input ceramic capacitor as close as possible to the high-side MOSFET source and the SP6134H VCC pin, and keep the feedback trace away from the switching node. The wide-bandwidth internal amplifier is sensitive to injected switching noise, which can show up as output ripple or instability. Use a Kelvin-sense connection at the VOUT/GND2 pads so that the load regulation measurement is not corrupted by IR drops.
At VIN = 12 V, VOUT = 3.3 V, and 2 A load, the SP6134EBMAX2A dissipates approximately 17.4 W (estimated: P_diss = (VIN - VOUT) x I_load = (12 - 3.3) x 2 = 17.4 W minus switching/conduction losses). The on-board synchronous MOSFETs and inductor must be rated for this dissipation; verify their thermal rise against the manufacturer's theta_JA values. For long-duration 2 A evaluation, attach a small heatsink or forced-air cooling to the board MOSFETs and inductor.
The 50 kOhm-to-100 kOhm upper-resistor stability rule from the SP6134 Evaluation Board manual is non-negotiable. Estimated: choosing R1 outside this range shifts the feedback network's pole/zero pair outside the bandwidth of the SP6134H internal error amplifier, which can cause subharmonic oscillations or poor transient response. Always pick R1 in the upper-resistor range and then solve R2 = R1 / ((VOUT / 0.8 V) - 1) for the desired VOUT.
Compliance Information
RoHS compliance is reported in the DigiKey and Mouser distributor listings for the SP6134EB family. AEC-Q100 automotive qualification is not applicable because this is an evaluation board, not a production component. Reach and conflict-minerals status inferred from standard MaxLinear compliance posture.
