component
MAX5033DASA+
Public Made by Adomby adom
Maxim Integrated DC-DC Converters, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMAX5033DASA+
Maxim Integrated · DC-DC Converters · SOIC-8
MAX5033DASA+ from Maxim Integrated, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | BST | passive | Boost capacitor connection; connect a 0.1μF ceramic capacitor from BST to LX to provide high-side gate drive. |
| 2 | VD | power_out | Internal regulator output; bypass VD to GND with a 0.1μF ceramic capacitor. |
| 3 | SGND | power_in | Internal connection; SGND must be connected to GND. |
| 4 | FB | input | Output sense feedback input; for MAX5033D (adjustable) use an external resistive divider to set VOUT, with VFB regulating set point of 1.22V. |
| 5 | ON/OFF | input | Shutdown control input; pull low to shut down, drive high for normal operation (rising threshold 1.69V typ, 100mV hysteresis). |
| 6 | GND | power_in | Ground. |
| 7 | VIN | power_in | Input voltage (7.5V to 76V operating range); bypass VIN to GND with a low-ESR capacitor as close to the device as possible. |
| 8 | LX | output | Source connection of the internal high-side switch. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Maxim Integrated |
| Package | SOIC-8 |
| Category | Power Management ICs |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Voltage Range (MAX5033D) | VIN | 7.5 | 76 | V | MAX5033D | 3 | |
| Feedback Voltage | VFB | 1.192 | 1.221 | 1.25 | V | VIN = 7.5V to 76V, MAX5033D | 4 |
| Quiescent Supply Current | IQ | 270 | 440 | µA | VFB = 1.3V, MAX5033D | 4 | |
| Shutdown Current | ISHDN | 10 | 45 | µA | VON/OFF = 0V, VIN = 7.5V to 76V | 4 | |
| Peak Switch Current Limit | ILIM | 0.95 | 1.5 | 2.1 | A | (Note 1) | 4 |
| Switch Leakage Current | IOL | 1 | µA | VIN = 76V, VON/OFF = 0V, VLX = 0V | 4 | ||
| Switch On-Resistance | RDS(ON) | 0.4 | 0.8 | Ω | ISWITCH = 500mA | 4 | |
| PFM Threshold | IPFM | 35 | 65 | 110 | mA | Minimum switch current in any cycle | 4 |
| FB Input Bias Current | IB | -150 | 0.01 | 150 | nA | MAX5033D | 4 |
| ON/OFF Input-Voltage Threshold | VON/OFF | 1.5 | 1.69 | 1.85 | V | Rising trip point | 4 |
| ON/OFF Input Current | ION/OFF | 10 | 150 | nA | VON/OFF = 0V to VIN | 4 | |
| ON/OFF Operating Voltage Range | VON/OFF | 76 | V | 4 | |||
| Oscillator Frequency | fOSC | 105 | 125 | 137 | kHz | 4 | |
| Regulator Output Voltage | VD | 6.5 | 7.8 | 9 | V | VIN = 8.5V to 76V, IL = 0mA | 4 |
| Undervoltage Lockout | UVLO | 5.2 | V | 3 | |||
| Efficiency | η | 90 | % | VIN = 12V, VOUT = 5V, ILOAD = 500mA, MAX5033D | 4 | ||
| ON/OFF Input-Voltage Hysteresis | VHYST | 100 | mV | 4 | |||
| Maximum Duty Cycle | DMAX | 95 | % | MAX5033D | 4 | ||
| Dropout Voltage (VD regulator) | 2 | V | 7.5V ≤ VIN ≤ 8.5V, IL = 1mA | 4 | |||
| VD Load Regulation | ΔVD/ΔIVD | 150 | Ω | 0 to 5mA | 4 | ||
| Thermal-Shutdown Junction Temperature | TSH | 160 | °C | 4 | |||
| Thermal-Shutdown Hysteresis | THYST | 20 | °C | 4 | |||
| Thermal Resistance Junction to Ambient | θJA | 170 | °C/W | SO package (JEDEC 51) | 4 | ||
| VIN | VIN | -0.3 | 80 | V | Referenced to GND | 2 | |
| SGND | SGND | -0.3 | 0.3 | V | 2 | ||
| LX | LX | -0.8 | V | to (VIN + 0.3V) | 2 | ||
| BST | BST | -0.3 | V | to (VIN + 10V) | 2 | ||
| BST (transient < 100ns) | BST | -0.3 | V | to (VIN + 15V) | 2 | ||
| BST to LX | -0.3 | 10 | V | 2 | |||
| BST to LX (transient < 100ns) | -0.3 | 15 | V | 2 | |||
| ON/OFF | -0.3 | 80 | V | 2 | |||
| VD | VD | -0.3 | 12 | V | 2 | ||
| FB (MAX5033D) | FB | -0.3 | 12 | V | MAX5033D | 2 | |
| Operating Temperature Range | -40 | 125 | °C | MAX5033_A_ _ | 2 | ||
| Storage Temperature Range | -65 | 150 | °C | 2 | |||
| Junction Temperature | TJ | 150 | °C | 2 | |||
| Lead Temperature (soldering, 10s) | 300 | °C | 2 | ||||
| Soldering Temperature (reflow), lead-free | 260 | °C | SO, PDIP Lead(Pb)-free | 2 |
CAD (KiCad official)
- Symbol:
MAX5033DASA+ - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
max5033dasa-etched.step/max5033dasa-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);max5033dasa.step/max5033dasa.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Maxim Integrated datasheet (17 pp, sha256
8bdd1152d8ab72ab, retrieved 2026-10-30, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).