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The L6983 is an easy to use synchronous monolithic step-down regulator capable of delivering up to 3 A DC to the load. The wide input voltage range makes the device suitable for a broad range of applications. The L6983 is based on a peak current mode architecture and is packaged in a QFN16 3x3 with internal compensation thus minimizing design complexity and size.
The L6983 is available both in low consumption mode (LCM) and low noise mode (LNM) versions. LCM maximizes the efficiency at light-load with controlled output voltage ripple so the device is suitable for battery-powered applications. LNM makes the switching frequency constant and minimizes the output voltage ripple for light load operations, meeting the specification for low noise sensitive applications. The L6983 allows the switching frequency to be selected in the 200 Hz - 2.2 MHz range with optional spread spectrum for improved EMC.
The EN pin provides enable/disable function. The typical shutdown current is 2 µA when disabled. As soon as the EN pin is pulled up, the device is enabled and the internal 1.3 ms soft-start takes place. The L6983 features Power Good open collector that monitors the FB voltage. Pulse-by-pulse current sensing on both power elements implements an effective constant current protection and thermal shutdown prevents thermal run-away.主要特性
- 3.5 V to 38 V operating input voltage
- Output voltage from 0.85 V to VIN
- 3.3 V and 5 V fixed output voltage versions
- 3 A DC output current
- 17 μA operating quiescent current
- Internal compensation network
- Two different versions: LCM for high efficiency at light loads and LNM for noise sensitive applications
- 2 μA shutdown current
- Internal soft-start
- Enable
- Overvoltage protection
- Output voltage sequencing
- Thermal protection
- 200 kHz to 2.2 MHz programmable switching frequency. Stable with low ESR capacitor
- Optional spread spectrum for improved EMC
- Power Good
- Synchronization to external clock for LNM devices
- QFN16 package
样片和购买
| 产品型号 | 封装 | 包装类型 | 供货状态 | ECCN (US) | Country of Origin | Approximate Price (US$)* / Qty | 从ST订购 | 从分销商订购 |
|---|---|---|---|---|---|---|---|---|
| L6983C33QTR | QFPN 3X3X0.80 16L PITCH 0.50 | Tape And Reel | 批量生产 | EAR99 | CHINA | 1.5 / 1k | 获取样片 | 查看供货情况 |
| L6983CQTR | QFPN 3X3X0.80 16L PITCH 0.50 | Tape And Reel | 批量生产 | EAR99 | CHINA | 1.5 / 1k | 获取样片 | 查看供货情况 |
| L6983N33QTR | QFPN 3X3X0.80 16L PITCH 0.50 | Tape And Reel | 批量生产 | EAR99 | CHINA | 1.5 / 1k | 获取样片 | 查看供货情况 |
| L6983N50QTR | QFPN 3X3X0.80 16L PITCH 0.50 | Tape And Reel | 批量生产 | EAR99 | CHINA | 1.5 / 1k | 获取样片 | 查看供货情况 |
| L6983C50QTR | QFPN 3X3X0.80 16L PITCH 0.50 | Tape And Reel | 批量生产 | EAR99 | CHINA | 1.5 / 1k | 获取样片 | 查看供货情况 |
| L6983NQTR | QFPN 3X3X0.80 16L PITCH 0.50 | Tape And Reel | 批量生产 | EAR99 | CHINA | 1.5 / 1k | 获取样片 | 查看供货情况 |
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图片 产品型号 制造商 描述 
STEVAL-ISA208V1 ST 38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983CQTR 
STEVAL-ISA209V1 ST 38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983NQTR 产品型号38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983CQTR
38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983NQTR
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| 产品型号 | 供货状态 | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| L6983C33QTR | 批量生产 | QFPN 3X3X0.80 16L PITCH 0.50 | Industrial | Ecopack2 | |
| L6983C50QTR | 批量生产 | QFPN 3X3X0.80 16L PITCH 0.50 | Industrial | Ecopack2 | |
| L6983CQTR | 批量生产 | QFPN 3X3X0.80 16L PITCH 0.50 | Industrial | Ecopack2 | |
| L6983N33QTR | 批量生产 | QFPN 3X3X0.80 16L PITCH 0.50 | Industrial | Ecopack2 | |
| L6983N50QTR | 批量生产 | QFPN 3X3X0.80 16L PITCH 0.50 | Industrial | Ecopack2 | |
| L6983NQTR | 批量生产 | QFPN 3X3X0.80 16L PITCH 0.50 | Industrial | Ecopack2 | |
L6983C33QTR
Package:
QFPN 3X3X0.80 16L PITCH 0.50Material Declaration**:
L6983C50QTR
Package:
QFPN 3X3X0.80 16L PITCH 0.50Material Declaration**:
L6983CQTR
Package:
QFPN 3X3X0.80 16L PITCH 0.50Material Declaration**:
L6983N33QTR
Package:
QFPN 3X3X0.80 16L PITCH 0.50Material Declaration**:
L6983N50QTR
Package:
QFPN 3X3X0.80 16L PITCH 0.50Material Declaration**:
L6983NQTR
Package:
QFPN 3X3X0.80 16L PITCH 0.50Material Declaration**:
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持 。
