S-13R1B33-M5T1U3 - 150mA, 3.3V LDO | ABLIC | SOT-23-5
料号： S-13R1B33-M5T1U3 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.95 | $0.95 |
| 10 | $0.85 | $8.50 |
| 100 | $0.72 | $72.00 |
| 500 | $0.62 | $310.00 |
| 1,000 | $0.55 | $550.00 |
S-13R1B33-M5T1U3 概述
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage approaches the desired output voltage. Within the broader power-management hierarchy, an LDO belongs to the linear regulator class, which itself sits under voltage regulators and ultimately power management ICs. Unlike switching regulators, LDOs introduce no switching noise or EMI, making them ideal for noise-sensitive analog and digital loads.
Key specifications include a 3.3 V fixed output with high output voltage accuracy, a maximum input voltage of 5.5 V, a typical PSRR of 70 dB at 1 kHz, and low quiescent current consumption. The dropout voltage remains low across the 150 mA load range, allowing the regulator to maintain regulation with minimal VIN-VOUT headroom and extending battery life in portable equipment.
The S-13R1B33-M5T1U3 uses CMOS process technology combined with an internal reference and feedback loop, giving high-accuracy output voltage in a small SOT-23-5 footprint. The internal reverse-current protection eliminates the need for an external series protection diode, simplifying the BOM in battery-backup and rail-sequencing designs. Operating temperature range is -40C to +85C, suitable for consumer, industrial, and IoT applications.
Typical applications include battery-powered IoT sensor nodes, wearable device power rails, microcontroller and Bluetooth Low Energy (BLE) module supply lines, and as a post-regulator following a switching converter to provide a low-noise rail for analog/RF circuitry. Reverse-current protection makes it well-suited for backup battery and OR-ing topologies.
When designing with this part, ensure the output capacitor is a ceramic type with capacitance of at least 1.0 uF over the full operating temperature range, as required for phase compensation per the manufacturer datasheet. Keep the input-output voltage differential within the rated limits and verify thermal dissipation under maximum load and minimum VIN.
This page synthesizes distributor pricing, drop-in alternatives within the same SOT-23-5 footprint, and practical design notes that complement the manufacturer datasheet, giving engineers a faster path from selection to working prototype.
直接替换替代料： S-13R1B33-M5T1U3 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： S-13R1B33-M5T1U3 （相同外形与封装尺寸） ——差异在于 Manufacturer, Maximum Output Current, Package.
快速对比工具——选择替代料号进行并排对比：
S-13R1B33-I5T1U3
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
S-13R1A33-M5T1U3
✅ 直接替换📋 参考替代料（不在目录中）
S-13R1H33-M5T1U3
✅ 直接替换📋 参考替代料（不在目录中）
S-13R1C33-M5T1U3
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
XC6206P332MR
✅ 直接替换✓ 有现货
$0.041 / 个
查看数据手册 →ME6211C33M5G
✅ 直接替换📋 参考替代料（不在目录中）
S-13R1B33-M5T1U3 最大额定值与电气特性
| Manufacturer | ABLIC Inc. (formerly Seiko Instruments Inc.) |
| Product Series | S-13R1 |
| Regulator Type | CMOS Low-Dropout Linear Voltage Regulator (LDO) |
| 输出类型 | Fixed |
| Output Voltage (Nominal) | 3.3 V |
| 最大输出电流 | 150 mA |
| 输入电压范围 | Up to 5.5 V |
| PSRR | 70 dB at 1 kHz |
| 输出数量 | 1 |
| Output Polarity | Positive |
| Over Current Protection | Yes (built-in) |
| Over Temperature Protection | Yes (thermal shutdown) |
| Reverse Current Protection | Yes (built-in) |
| 工作温度范围 | -40C to +85C (Ta) |
| 封装 | SOT-23-5 |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
S-13R1B33-M5T1U3 引脚配置
| 引脚 1 | VIN — Input supply voltage; connect to upstream rail with decoupling capacitor |
| 引脚 2 | GND (VSS) — Common ground reference |
| 引脚 3 | ON/OFF — Enable input (active-high logic per datasheet) |
| 引脚 4 | NC — Not connected; leave floating or to VOUT per layout note |
| 引脚 5 | VOUT — Regulated 3.3 V output; 1.0 uF ceramic capacitor to GND required |
典型应用
S-13R1B33-M5T1U3 适用于 6 应用s: Battery-Powered IoT Sensor Nodes, Post-Regulator After Switching DC-DC, Wearable Health Device Power Rail, Industrial Sensor Module Supply, Bluetooth Low Energy Module Power, Backup-Battery OR-ing Supply.
Battery-Powered IoT Sensor Nodes
The ABLIC S-13R1B33-M5T1U3 is well matched to battery-powered IoT sensor nodes that draw bursts of current up to 150 mA from a coin-cell or Li-ion source. The low quiescent current and built-in reverse-current protection prevent battery discharge during sleep and hibernate cycles, while the 3.3 V fixed output directly powers common BLE, LoRa, and Cortex-M0+ MCUs. Designers typically place a 1.0 uF ceramic capacitor on VOUT and a small input decoupling capacitor on VIN, achieving months-to-years of battery life. The SOT-23-5 footprint occupies under 9 mm², allowing placement alongside a coin-cell holder. Compared to a switching regulator, this LDO adds zero switching noise to nearby analog sensor front-ends such as temperature, humidity, or gas sensors.
推荐
Post-Regulator After Switching DC-DC
After a switching DC-DC converter produces a noisy intermediate rail (e.g., 4.0 V from a buck), engineers place the S-13R1B33-M5T1U3 to drop the rail to a clean 3.3 V for analog or RF circuitry. With 70 dB PSRR at 1 kHz, the regulator attenuates the fundamental switching frequency and harmonics before they reach sensitive loads like ADCs, DACs, or RF transceivers. The 150 mA output handles typical analog/RF subsystem budgets, while the reverse-current protection prevents the LDO from back-feeding the upstream converter when VIN droops. Designers must keep the input-to-output differential above the dropout voltage to maintain regulation. Compared to adding an LC filter, this approach also rejects switching noise at low audio frequencies where filters become impractical.
推荐
Wearable Health Device Power Rail
Wearables such as fitness bands, smart watches, and continuous glucose monitors rely on compact, low-noise LDOs like the S-13R1B33-M5T1U3 to power 3.3 V subsystems from a single-cell Li-ion battery. The regulator's small SOT-23-5 footprint enables dense PCB layouts, while its low quiescent current and 70 dB PSRR at 1 kHz keep the optical heart-rate, SpO2, and accelerometer analog front-ends free of supply-induced noise. The built-in reverse-current protection is critical during battery hot-swap and USB-charge scenarios, preventing back-feeding. Designers often pair this LDO with a separate battery-charge controller and a step-up converter for backlight LEDs. The -40C to +85C operating range supports outdoor athletic and clinical environments.
推荐
Industrial Sensor Module Supply
In factory-automation and process-control sensor modules, the S-13R1B33-M5T1U3 provides a robust 3.3 V rail for microcontrollers, digital isolators, and 4-20 mA loop interfaces. Its -40C to +85C industrial temperature range, internal over-current and over-temperature protection, and reverse-current blocking make it tolerant of wiring faults, inrush transients, and back-feed from charged sensor cables. The 150 mA output covers MCU plus 4-20 mA DAC plus indicator LED demand. Designers route the 24 V industrial bus through a switching pre-regulator to a 5 V intermediate, then drop to 3.3 V through this LDO, achieving both efficiency and clean analog supply. Compared to discrete zener-based references, this approach yields tighter output tolerance and self-protection.
推荐
Bluetooth Low Energy Module Power
BLE modules such as the Nordic nRF51 series require a clean 3.3 V supply to meet radio emission and sensitivity specifications. The S-13R1B33-M5T1U3 provides up to 150 mA for transmit bursts while presenting a low-noise rail during receive modes thanks to 70 dB PSRR at 1 kHz. The 3.3 V fixed output eliminates resistor-dividers, reducing BOM count and improving start-up repeatability. The internal thermal shutdown protects the system during sustained TX at elevated ambient. Designers typically combine the LDO with a power-mode controller to gate the radio during sleep, leveraging the regulator's low quiescent current. Compared to a buck converter, this LDO also avoids radiated EMI that could otherwise desensitize an adjacent BLE antenna.
推荐
Backup-Battery OR-ing Supply
In systems with a primary supply and a backup battery (coin cell or supercapacitor), the S-13R1B33-M5T1U3's built-in reverse-current protection acts as an effective OR-ing device when paired with a Schottky diode on the primary rail. When the primary drops, the LDO continues sourcing 3.3 V from the backup without leaking current back to the discharged primary rail. The 150 mA output sustains RTC, SRAM, and supervisory circuits through a brown-out event. Designers commonly combine this topology with a battery-monitor IC and an ultra-low-IQ RTC. Compared to a discrete P-MOSFET OR-ing circuit, the integrated reverse-current protection lowers BOM cost and eliminates the need for gate-driving logic.
推荐
推荐产品汇总
工程参考数据： S-13R1B33-M5T1U3 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | S-13R1B33-I5T1U3 | S-13R1A33-M5T1U3 | S-13R1H33-M5T1U3 | XC6206P332MR |
|---|---|---|---|---|---|
| Package | SOT-23-5 | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same |
| Brand | ABLIC | ABLIC | ABLIC | ABLIC | Torex Semiconductor |
| Output Voltage | 3.3 V (fixed) | 3.3 V (fixed) | 3.3 V (fixed) | 3.3 V (fixed) | 3.3 V (fixed) |
| Maximum Output Current | 150 mA | 150 mA | 150 mA | 150 mA | 200 mA |
| Maximum Input Voltage | 5.5 V | 5.5 V | 5.5 V | 5.5 V | 6.0 V |
| Reverse-Current Protection | Yes (built-in) | Yes (built-in) | Yes (built-in) | Yes (built-in) | No |
| Operating Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| RoHS Compliance | Compliant | Compliant | Compliant | Compliant | Compliant |
关键差异点
- Built-in reverse-current protection without external diode （对比 XC6206P332MR)
- Tighter output voltage accuracy grade (B series) （对比 S-13R1A33-M5T1U3)
- Industrial-grade temperature rating across the family （对比 Consumer-grade SOT-23-5 LDOs)
设计说明
Place the 1.0 uF ceramic output capacitor within 5 mm of the VOUT pin to keep the regulator loop stable over the full -40C to +85C range. Use X7R or X5R dielectric to minimize capacitance derating; the ESR must remain inside the ABLIC S-13R1 datasheet window. Add a 0.1 uF capacitor next to the VIN pin for high-frequency decoupling of any upstream switching converter ripple.
Estimated: at VIN=5.0 V, VOUT=3.3 V, and 150 mA load, the regulator dissipates approximately 255 mW. With the SOT-23-5 theta_JA typically near 250 C/W on a 1 oz FR-4 board, the junction-to-ambient temperature rise is about 64 C above ambient. De-rate load or improve PCB copper pour if the application approaches the +85C ambient limit; otherwise thermal shutdown is rarely triggered for this load level.
Do not omit the output capacitor. The S-13R1 series uses the output cap for phase compensation; without it the regulator may oscillate. Avoid tantalum or aluminum electrolytic output capacitors because their higher ESR degrades stability. Also confirm the ON/OFF pin logic - the M5T1U3 option is typically active-high, so leaving the pin open can cause the regulator to remain disabled; tie ON/OFF to VIN through a resistor if unused.
合规信息
RoHS compliance confirmed by JLCPCB listing and ABLIC product page. AEC-Q100 not applicable - this is an industrial/consumer-grade CMOS LDO, not an automotive-qualified part. Reach compliance assumed based on standard ABLIC product policy.
