component
LD5523NGL-M
Public Made by Adomby adom
Leadtrend Tech AC-DC Controllers And Regulators, SOT-26. 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
markdownLD5523NGL-M
Leadtrend Tech · AC-DC Controllers And Regulators · SOT-26
LD5523NGL-M from Leadtrend Tech, in a SOT-26. 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 | GND | power_in | Ground pin of the controller, the reference for all pins (the datasheet gives no further limit for this pin). |
| 2 | COMP | output | Output of the error amplifier for voltage compensation, which needs a 330 pF to 4700 pF X7R capacitor to filter switching noise, has an internal pull-high resistor, and turns off the gate output if left floating. |
| 3 | FB | input | Auxiliary voltage sense for brown-in/out, bulk-cap OVP, FB OVP (trip 3.3 V to 3.7 V), FB UVP (0.8 V) and quasi-resonant detection, with an absolute maximum of -0.3 V to 7 V. |
| 4 | CS | input | Current sense input for the MOSFET current with a 0.5 V (0.48 V to 0.52 V) maximum input voltage and 275 ns leading-edge blanking, which also serves as the external OTP input and requires a 47 pF to 470 pF capacitor. |
| 5 | VCC | power_in | Supply voltage pin with a recommended operating range of 8.0 V to 26.5 V, an absolute maximum of 30 V, and an OVP threshold of 27 V to 29 V, which needs a 0.1 µF to 0.47 µF ceramic capacitor placed close to the pin. |
| 6 | OUT | output | Gate drive output that drives the external MOSFET with about 350 mA drive capability, a high clamp of 11.5 V at VCC = 18 V, and an absolute maximum of -0.3 V to VCC + 0.3 V. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Leadtrend Tech |
| Package | SOT-26 |
| Category | Power Management (PMIC) |
| Pins | 6 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage (VCC pin) absolute maximum | VCC | -0.3 | 30 | V | 4 | ||
| COMP pin voltage absolute maximum | -0.3 | 12 | V | 4 | |||
| FB, CS pin voltage absolute maximum | -0.3 | 7 | V | 4 | |||
| OUT pin voltage absolute maximum | -0.3 | V | 4 | ||||
| Maximum Junction Temperature | 150 | C | 4 | ||||
| Storage Temperature Range | -65 | 150 | C | 4 | |||
| Lead temperature (Soldering) | 260 | C | Soldering, 10sec | 4 | |||
| ESD Voltage Protection, Human Body Model | 2.5 | KV | 4 | ||||
| ESD Voltage Protection, Machine Model | 250 | V | 4 | ||||
| Operating Junction Temperature | -40 | 125 | C | 4 | |||
| Supply VCC Voltage | VCC | 8 | 26.5 | V | 4 | ||
| VCC Capacitor | 3.3 | 10 | µF | 4 | |||
| Start-up resistor Value (AC Side, Half Wave) | 400 | 2 | K / M | AC side, half wave; printed as 400K to 2M | 4 | ||
| Comp Pin Capacitor (X7R type) | 330 | 4700 | pF | X7R type | 4 | ||
| CS Pin Capacitor Value | 47 | 470 | pF | 4 | |||
| Startup Current | ICC_ST | 1 | µA | 5 | |||
| Brown in (before first pulse)/ Brown out operating current | ICC_OPA3 | 0.7 | 1.1 | 1.5 | mA | 5 | |
| UVLO(OFF) threshold | VCC_OFF | 6 | 7 | 8 | V | 5 | |
| UVLO(ON) threshold | VCC_ON | 15.5 | 16.5 | 17.5 | V | 5 | |
| VCC OVP Level | VCC_OVP | 27 | 28 | 29 | V | 5 | |
| Max. OCP Compensation Current | IOCP_MAX | 200 | 225 | 250 | µA | IFB=300µA | 5 |
| Maximum Input Voltage (CS pin) | VCS_LIMIT | 0.48 | 0.5 | 0.52 | V | 5 | |
| Brown In Trip Level | IBNI | 90 | 95 | 100 | µA | 5 | |
| FB OVP Trip voltage Level | VFB_OVP | 3.3 | 3.5 | 3.7 | V | 6 | |
| CS OTP Level | VCS_OTP | 0.48 | 0.5 | 0.52 | V | 6 | |
| CCM Frequency | FCCM | 60 | 65 | 70 | kHz | 6 | |
| Frequency Swapping | FSW_MOD | -8 | 8 | % | printed ±8 % | 6 | |
| Green Mode Frequency | FSW_GREEN | 21 | 24 | 27 | kHz | 6 | |
| Temp. Stability | FSW_TS | 3 | 5 | % | 6 | ||
| Output High Level | VOH | 9 | 14 | V | VCC =15V, Io=20mA | 6 | |
| Operating Current (with 1nF load on OUT pin) | ICC_OP1 | 0.285 | mA | VCOMP=0V, OUT=1nF | 5 | ||
| Operating Current (with 1nF load on OUT pin) | ICC_OP2 | 2.4 | mA | VCOMP=1.7V, OUT=1nF, IFB=200µA | 5 | ||
| Auto current protection | ICC_OPA1 | 0.6 | mA | 5 | |||
| Short Circuit Current (COMP pin) | ICOMP | 0.116 | mA | VCOMP=0V | 5 | ||
| Open Loop Voltage | VCOMP_OPEN | 3.15 | V | 5 | |||
| Min. OCP Compensation Current | IOCP_MIN | 71 | µA | IFB=100µA | 5 | ||
| Leading Edge Blanking Time | TLEB | 275 | ns | 5 | |||
| Internal Slope Compensation | VSLP_L | 165 | mV | *ton>3s to DMAX (linearly increase) | 5 | ||
| Delay to Output | TPD | 80 | ns | 5 | |||
| BNO Hysteresis | IBNO_HYS | 10 | µA | 5 | |||
| Brown Out De-bounce Time | TDB_BNO | 75 | ms | VCOMP=1.7V | 5 | ||
| Bulk Cap OVP | IBULK_OVP | 418 | µA | 5 | |||
| Bulk Cap OVP delay | TFB_BOVP | 500 | ms | 5 | |||
| FB UVP Trip voltage Level | VFB_UVP | 0.8 | V | 6 | |||
| QRD Trip Level | IQRD | 20 | µA | 6 | |||
| CS OTP de-bounce time | TCS_OTP | 5.4 | ms | 6 | |||
| Voltage Stability | FSW_VS | 1 | % | VCC =9V~24V | 6 | ||
| Maximum Duty | DMAX | 81 | % | 6 | |||
| Output Low Level | VOL | 1 | V | VCC =15V, Io=20mA | 6 | ||
| Rising Time | Tr | 280 | ns | VCC =15V CL=1000pF | 6 | ||
| Falling Time | Tf | 30 | ns | VCC =15V CL=1000pF | 6 | ||
| Output High Clamp Level | VO_CLAMP | 11.5 | V | VCC =18V | 6 | ||
| Soft Start Time | TSS | 7 | ms | VCS_OFF from 0.2V to 0.5V | 6 | ||
| SDSP CS Pin Level | VCS_SDSP | 1.3 | V | Secondary diode short | 6 | ||
| OLP Trip Level | VOLP | 2.8 | V | 6 | |||
| OLP delay time | TD_OLP | 210 | ms | After soft-start | 6 | ||
| On Chip OTP Level | TINOTP | 140 | C | 6 | |||
| On Chip OTP Hysteresis | TINOTP_HYS | 12 | C | 6 | |||
| Power Dissipation (SOT-26) | 200 | mW | Ambient Temperature = 85C | 4 | |||
| Package Thermal Resistance (SOT-26, θJA) | θJA | 200 | C/W | 4 |
CAD (KiCad official)
- Symbol:
LD5523NGL-M - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-26 (KiCad packages3D, STEP)
- 3D model files:
ld5523ngl-m-etched.step/ld5523ngl-m-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ld5523ngl-m.step/ld5523ngl-m.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Leadtrend Tech datasheet (16 pp, sha256
8ef0ea772e39e056, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).