LMZ22003TZ - 3A 20V Buck Power Module | Texas Instruments
料号： LMZ22003TZ ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.85 | $7.85 |
| 10 | $7.21 | $72.10 |
| 100 | $6.48 | $648.00 |
| 500 | $5.79 | $2,895.00 |
| 1,000 | $5.15 | $5,150.00 |
LMZ22003TZ 概述
A DC-DC buck converter reduces a higher DC input voltage to a lower regulated rail. This SIMPLE SWITCHER module integrates the switching power stage and shielded inductor into one thermally enhanced package, simplifying layout compared with a discrete buck design. It belongs to the broader DC-DC converter and power-management IC hierarchy for industrial, communications, and embedded systems.
Key features include a maximum total output power of 18 W, low component count, low output-voltage ripple, and testing to EN55022 Class B. Only two external resistors and three external capacitors are required to complete the power solution. Frequency synchronization input and an external soft-start capacitor add flexibility for multi-rail systems and controlled startup sequencing.
The module uses a synchronous buck architecture with integrated shielded inductor technology. Its 7-pin TO-PMOD package measures approximately 13.77 mm by 10.16 mm and is 4.57 mm high. The package supports hand or machine soldering, while its integrated inductor simplifies magnetic-component selection and PCB layout.
Typical uses include 12 V-to-5 V and 12 V-to-3.3 V point-of-load conversion, communications equipment, industrial controllers, networking hardware, and embedded computing. The 20 V maximum input suits 12 V industrial and telecom rails, while the adjustable output supports multiple common logic voltages.
For robust operation, verify input undervoltage, output-current margin, thermal rise, and layout requirements against the manufacturer datasheet. Respect the 20 V maximum input voltage and account for startup behavior when sequencing multiple rails. The external soft-start capacitor and enable control should be evaluated for the target system’s power-up requirements.
This page consolidates verified Texas Instruments specifications, distributor availability data, and practical engineering guidance. It also identifies same-brand pin-compatible family options and clearly separates confirmed facts from parameters that still require design verification.
直接替换替代料： LMZ22003TZ ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
LMZ23603
✅ 直接替换📋 参考替代料（不在目录中）
LMZ23605
✅ 直接替换📋 参考替代料（不在目录中）
LMZ22005
✅ 直接替换📋 参考替代料（不在目录中）
LMZ22003TZ 最大额定值与电气特性
| Product Type | Non-isolated SIMPLE SWITCHER buck power module |
| 拓扑 | Step-down buck converter |
| 最大输出电流 | 3 A |
| Maximum Total Output Power | 18 W |
| 输入电压范围 | 6 V to 20 V |
| 输出电压范围 | 0.8 V to 6 V |
| 效率 | Up to 92% |
| 开关频率 | 914 kHz |
| Inductor | Integrated shielded inductor |
| External Components | 2 resistors and 3 capacitors |
| Electromagnetic Compatibility | Tested to EN55022 Class B |
| Package Type | 7-pin TO-PMOD |
| Package Dimensions | 13.77 mm x 10.16 mm x 4.57 mm |
| Startup Control | External soft-start capacitor and precision enable |
| Frequency Synchronization | Supported |
| Protection | Thermal shutdown, programmable input undervoltage, and inrush-current protection |
| RoHS 状态 | Compliant |
LMZ22003TZ 引脚配置
| 引脚 1 | GND — Power ground |
| 引脚 2 | SW — Switch node |
| 引脚 3 | VIN — Input voltage |
| 引脚 4 | EN/SS — Precision enable and external soft-start connection |
| 引脚 5 | SYNC — Frequency synchronization input |
| 引脚 6 | FB — Feedback input |
| 引脚 7 | VOUT — Regulated output voltage |
典型应用
LMZ22003TZ 适用于 6 应用s: 12 V to 5 V Point-of-Load Conversion, 12 V to 3.3 V Logic Rail, Industrial Control Equipment, Communications and Networking Hardware, Embedded Computing Platforms, Instrumentation and Test Equipment.
12 V to 5 V Point-of-Load Conversion
LMZ22003TZ fits industrial and communications equipment that converts a nominal 12 V rail into a regulated 5 V load rail. Its 6 V to 20 V input range accepts the nominal voltage, while the adjustable 0.8 V to 6 V output supports 5 V regulation. The integrated shielded inductor simplifies the power stage, and the 18 W limit permits 3 A at approximately 6 V but requires derating near 5 V according to exact operating conditions. Only two resistors and three capacitors complete the circuit, reducing board area while preserving a compact seven-pin TO-PMOD footprint.
推荐
12 V to 3.3 V Logic Rail
LMZ22003TZ can generate an adjustable 3.3 V rail from a 12 V source because both voltages fall within its verified 6 V to 20 V input and 0.8 V to 6 V output ranges. The module is useful where a compact point-of-load solution is preferred over a discrete inductor-and-controller design. Its shielded integrated inductor reduces the number of magnetic components, while efficiency up to 92% helps limit conversion heat. Designers must verify feedback accuracy, startup timing, transient response, and output ripple against the actual load and the datasheet reference layout.
推荐
Industrial Control Equipment
LMZ22003TZ suits compact 12 V or higher industrial control boards requiring multiple regulated point-of-load rails. The 20 V maximum input covers common nominal industrial buses, and precision enable plus an external soft-start capacitor support controlled multi-rail startup. Its integrated shielded inductor and low external-component count help reduce assembly complexity. Thermal design remains important because the package must dissipate conversion loss continuously; engineers should evaluate worst-case input voltage, load, ambient temperature, copper area, and nearby heat sources using manufacturer guidance.
推荐
Communications and Networking Hardware
LMZ22003TZ is appropriate for communications equipment that derives low-voltage processor or transceiver rails from a nominal 12 V input. Its switching frequency near 914 kHz supports compact magnetics integration, and the module reports low output-voltage ripple. Frequency synchronization can help coordinate it with related system rails or converters. The EN55022 Class B test reference provides useful EMI guidance, but the final board still requires standard electromagnetic-compatibility validation because conducted and radiated results depend on layout, cables, load behavior, and external components.
推荐
Embedded Computing Platforms
LMZ22003TZ can supply compact processor, memory, or peripheral rails in embedded platforms with a 6 V to 20 V input. Its 3 A capability and 18 W total-output limit provide adequate headroom for moderate digital loads, while the adjustable output supports 0.8 V through 6 V. The external soft-start feature allows controlled ramp behavior, which is useful where rail sequencing or inrush control matters. Check the maximum transient load, permitted output ripple, feedback network, and startup timing before using the module for high-dynamic-range processor rails.
推荐
Instrumentation and Test Equipment
LMZ22003TZ supports test and measurement instruments that need local 0.8 V to 6 V rails from a higher-voltage supply. The integrated shielded inductor and small external-component count can reduce design time in multi-rail instruments. Adjustable output allows designers to tailor the regulator to processor, memory, analog, or interface sections. For measurement accuracy, evaluate output ripple, feedback-network tolerance, load-transient behavior, and grounding. The 92% maximum efficiency reduces thermal burden but does not remove the need to verify temperature rise at sustained worst-case conversion loss.
推荐
推荐产品汇总
工程参考数据： LMZ22003TZ ——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 | LMZ23603 | LMZ23605 | LMZ22005 |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 7-pin TO-PMOD | TO-PMOD; same family footprint | TO-PMOD; same family footprint | TO-PMOD; same family footprint |
| Integrated Inductor | Yes, shielded | SIMPLE SWITCHER module family; exact value not supplied | SIMPLE SWITCHER module family; exact value not supplied | SIMPLE SWITCHER module family; exact value not supplied |
关键差异点
- High power capability for a compact module （对比 LMZ23605)
- Wide 12 V-compatible input range （对比 LMZ23603)
- Integrated shielded inductor simplifies assembly （对比 LMZ22005)
设计说明
Calculate conversion loss at the worst-case operating point before assigning the allowed board-area budget. Estimated: at 12 V input, 5 V output, and 2 A output, the output power is 10 W; at 90% efficiency, input power is approximately 11.1 W and dissipation is approximately 1.1 W. Confirm actual efficiency and package thermal resistance from the datasheet, then provide copper and airflow appropriate to the maximum ambient temperature.
Place the input capacitor, output capacitor, feedback components, and module as close together as the reference layout permits. Keep the high-current switching loop compact and provide a low-impedance ground path. The module integrates its shielded inductor, but exposed-pad or thermal-pad requirements, if present, must be implemented according to the official land pattern rather than inferred from package height alone.
Use the two feedback resistors and external capacitors only with values supported by the manufacturer calculations. Do not treat 3 A as unconditional at every output voltage: the verified 18 W total-output ceiling imposes a lower current as output voltage rises. Also preserve the 20 V maximum input rating and account for transients, tolerance, and ringing at the source node.
Validate soft-start timing and enable polarity in the assembled system. The external soft-start capacitor influences ramp rate and inrush behavior, while synchronization can couple this converter to another switching node. Avoid assuming SYNC can be left functionally irrelevant without checking its datasheet state, source limits, and frequency range; incorrect connection can disturb startup or regulation.
Although the module is referenced as tested to EN55022 Class B, that result does not certify every finished product. High di/dt switch currents can produce conducted and radiated emissions. Follow the recommended input and output capacitor network, keep feedback routing away from the switching node, inspect board-edge return currents, and perform emissions testing on the final cable and enclosure configuration.
合规信息
The supplied technical data identifies the device as RoHS compliant and a green product with no Sb or Br. It does not verify REACH, halogen-free status, conflict-minerals compliance, or automotive qualification.
