首頁 電源管理 AC/DC 和 DC/DC 轉換器 (整合式 FET)
首頁
電源管理
AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM27762

現行

具整合式 LDO 的低雜訊正負輸出充電幫浦

立即訂購
產品規格表

LM27762

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -40 to 85 Type Charge pump Iout (max) (A) 0.25 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 1800 Switching frequency (max) (kHz) 2200 Features Enable, Integrated LDO, Light Load Efficiency Mode, Multiple Outputs, Output discharge, Power good, Regulated, Synchronous Rectification Vout (min) (V) -5 Vout (max) (V) 5 Iq (typ) (µA) 390
Rating Catalog Operating temperature range (°C) -40 to 85 Type Charge pump Iout (max) (A) 0.25 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 1800 Switching frequency (max) (kHz) 2200 Features Enable, Integrated LDO, Light Load Efficiency Mode, Multiple Outputs, Output discharge, Power good, Regulated, Synchronous Rectification Vout (min) (V) -5 Vout (max) (V) 5 Iq (typ) (µA) 390
WSON (DSS) 12 6 mm² 3 x 2
  • Generates Low-Noise Adjustable Positive Supply Voltage Between 1.5 V and 5 V and Negative Supply Voltage Between –1.5 V and –5 V
  • Input Voltage Range 2.7 V to 5.5 V
  • ±250-mA Output Current
  • Inverting Charge Pump Followed by Negative LDO
  • 2-MHz Low-Noise Fixed-Frequency Operation
  • 2.5-Ω Inverter Output Impedance, VIN = 5 V
  • Negative LDO Dropout Voltage 30 mV at 100 mA, VOUT = –5 V
  • Positive LDO with 45-mV Dropout Voltage at 100 mA, VOUT = 5 V
  • 390-µA Quiescent Current (Typical)
  • Shutdown Quiescent Current to 0.5 µA (Typical)
  • Current Limit and Thermal Protection
  • Power Good Pin (Active Low)
  • Create a Custom Design Using the LM27762 With the WEBENCH Power Designer
  • Generates Low-Noise Adjustable Positive Supply Voltage Between 1.5 V and 5 V and Negative Supply Voltage Between –1.5 V and –5 V
  • Input Voltage Range 2.7 V to 5.5 V
  • ±250-mA Output Current
  • Inverting Charge Pump Followed by Negative LDO
  • 2-MHz Low-Noise Fixed-Frequency Operation
  • 2.5-Ω Inverter Output Impedance, VIN = 5 V
  • Negative LDO Dropout Voltage 30 mV at 100 mA, VOUT = –5 V
  • Positive LDO with 45-mV Dropout Voltage at 100 mA, VOUT = 5 V
  • 390-µA Quiescent Current (Typical)
  • Shutdown Quiescent Current to 0.5 µA (Typical)
  • Current Limit and Thermal Protection
  • Power Good Pin (Active Low)
  • Create a Custom Design Using the LM27762 With the WEBENCH Power Designer

The LM27762 delivers very low-noise positive and negative outputs that are adjustable between ±1.5 V and ±5 V. Input-voltage range is from 2.7 V to 5.5 V, and output current goes up to ±250 mA. With an operating current of only 390 µA and 0.5-µA typical shutdown current, the LM27762 provides ideal performance for power amplifier and DAC bias and other high-current, low-noise negative voltage needs. The device provides a small solution size with few external components.

Negative voltage is generated by a regulated inverting charge pump followed by a low-noise negative LDO. The inverting charge pump of the LM27762 device operates at 2-MHz (typical) switching frequency to reduce output resistance and voltage ripple. Positive voltage is generated from the input by a low-noise positive LDO.

Positive and negative outputs of LM27762 have dedicated enable inputs. These outputs support independent timing for the positive and negative rails for specific system power-sequence needs. Enable inputs can be also shorted together and connected to the input voltage. The LM27762 has an optional Power Good feature.

For all available packages, see the orderable addendum at the end of the data sheet.

The LM27762 delivers very low-noise positive and negative outputs that are adjustable between ±1.5 V and ±5 V. Input-voltage range is from 2.7 V to 5.5 V, and output current goes up to ±250 mA. With an operating current of only 390 µA and 0.5-µA typical shutdown current, the LM27762 provides ideal performance for power amplifier and DAC bias and other high-current, low-noise negative voltage needs. The device provides a small solution size with few external components.

Negative voltage is generated by a regulated inverting charge pump followed by a low-noise negative LDO. The inverting charge pump of the LM27762 device operates at 2-MHz (typical) switching frequency to reduce output resistance and voltage ripple. Positive voltage is generated from the input by a low-noise positive LDO.

Positive and negative outputs of LM27762 have dedicated enable inputs. These outputs support independent timing for the positive and negative rails for specific system power-sequence needs. Enable inputs can be also shorted together and connected to the input voltage. The LM27762 has an optional Power Good feature.

For all available packages, see the orderable addendum at the end of the data sheet.

filter 尋找其它 AC/DC 和 DC/DC 轉換器 (整合式 FET)
下載 觀看有字幕稿的影片 影片

技術文件

star =TI 所選的此產品重要文件
找不到結果。請清除您的搜尋條件，然後再試一次。
檢視所有 5
類型 標題 日期
* Data sheet LM27762 Low-Noise Positive and Negative Output Integrated Charge Pump Plus LDO datasheet (Rev. B) PDF | HTML 2017年 2月 6日
Application note Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) PDF | HTML 2022年 5月 23日
Technical article Low-noise charge pumps make it easy to create negative voltages PDF | HTML 2017年 8月 30日
Technical article The top three ways to split a voltage rail to a bipolar supply PDF | HTML 2016年 12月 27日
User guide Using the LM27762 Evaluation Module 2016年 8月 26日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

ADS1235EVM — ADS1235 評估模組

The ADS1235 evaluation module (EVM) is a platform for evaluating the ADS1235 analog-to-digital converter (ADC). ADS1235 is a low-drift, 24-bit, 7200-SPS, 6-channel delta-sigma (ΔΣ) ADC with an integrated PGA for low-noise bridge measurements. This sensor-ready ADC provides a (...)

使用指南: PDF
View Options
開發板

ADS1261EVM — ADS1261 評估模組

The ADS1261 evaluation module (EVM) is a platform for evaluating the ADS1261 analog-to-digital converter (ADC). ADS1261 is a low-drift, 24-bit, 40-kSPS, 10-channel delta-sigma (ΔΣ) ADC with an integrated PGA, voltage reference, and internal fault monitors. This sensor-ready ADC provides (...)

使用指南: PDF
View Options
開發板

LM27762EVM — 具整合式 LDO 的 LM27762 低雜訊正負輸出充電幫浦評估模組

The LM27762 evaluation module (EVM) helps designers evaluate the operation and performance of this device. The   LM27762EVM uses the LM27762 to provide very low-noise adjustable positive and negative outputs for an input voltage range of 2.7 V to 5.5 V. Five low-cost capacitors are (...)
使用指南: PDF
TI.com 無法提供
模擬型號

LM27762 Unencrypted PSpice Transient Model Package (Rev. B)

SNVMAV1B.ZIP (122 KB) - PSpice Model
下載
參考設計

TIDA-01434 — 適用於 24 位元 ADC 的隔離式、無變壓器、雙極供電參考設計

This isolated, 3.65-mm thin reference design enables highly-integrated, bipolar input and high-performance solutions with a 24-bit delta-sigma analog-to-digital converter (ADC). Modern analog input modules need high performance in different aspects such as higher channel density at the same room (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-00300 — 適用於通訊和類比輸入/輸出模組的隔離式電源架構參考設計

This reference design provides a means to isolate I2C or SPI communication lines. This is often required in grid infrastructure applications such as protection relays and circuit breakers where high voltages are involved. This reference design provides both power isolation and signal isolation.
Design guide: PDF
電路圖: PDF
參考設計

TIDA-010065 — 基於高效、低排放、隔離式 DC/DC 轉換器的類比輸入模組參考設計

此參考設計為一簡化架構，可產生隔離式電源供應，適用於測量隔離電壓與電流的隔離式放大器。具 5-V 輸入之強化隔離操作的完全整合式 DC/DC 轉換器，並具備可設定 5-V 或 5.4-V 輸出 (適用於低壓降穩壓器 (LDO) 的空餘空間) 可產生隔離電源。介接至 ±50-mV 輸入範圍隔離放大器，且配置爲通道隔離輸入的分流，可測量電流。連接至 ±250-mV 或 ±12-V 輸入範圍隔離放大器，且配置爲群組隔離輸入的潛在分頻器，可測量電壓。隔離放大器介面直接輸出至 24 位元 ΔΣ 類比轉數位轉換器 (ADC)，或使用增益放大器擴展至 ±10 V，並連接至 16 位元 SAR ADC (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-00834 — 使用具有 ±10V 量測範圍之 16 位元 SAR ADC 的高準確度類比前端參考設計

The TIDA-00834 reference design accurately measures voltage and current inputs using simultaneously sampled, 16-bit, ±10 V, bipolar input SAR ADC critical to identify power systems malfunction and power quality related failures accurately and quickly. This results in reduced power systems (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-00835 — 採用 24 位元 Delta-Sigma ADC 的高準確度 ±0.5% 電流和隔離式電壓量測參考設計

The TIDA-00835 reference design allows for accurate voltage and current measurement using a bipolar input configuration by incorporating a four- channel, 24-bit simultaneously-sampling differential input Delta-Sigma ADC over wide dynamic range. The ADC is configured to measure ±2.5 V bipolar (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-010055 — 非隔離電源架構，具有用於保護繼電器模組的診斷參考設計

This reference design showcases non-isolated power supply architectures for protection relays with analog input/output and communication modules generated from 5-, 12-, or 24-V DC input. To generate the power supplies the design uses DC/DC converters with an integrated FET, a power module with an (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-01214 — 採用16 位元 ADC 和數位隔離器的隔離式高準確度類比輸入模組參考設計

此參考設計在廣泛輸入範圍內使用精密 16 位元 SAR ADC，提供準確的 AC 電壓和電流輸入測量，涵蓋保護和測量範圍 (包括 IEC 61850-9-2 的取樣要求)、簡化系統設計，並改善跳脫時間性能和可靠性。類比輸入模組 (AIM) 使用具有整合電源的數位隔離器，與主機處理器隔離。針對有限功能與成本最佳化的設計方法，AC AIM 僅可使用三種 TI 產品設計，可降低系統成本與電路板尺寸。警報功能會以取樣方式識別 AC 類比輸入故障，以加快故障偵測速度。ADC 具有額外的輔助通道，可診斷數位隔離器的電源輸出。具增益放大器的 12 位元 ADS8668 (...)
Design guide: PDF
電路圖: PDF
參考設計

TIDA-01341 — Hi-Fi 耳機放大器電源供應參考設計

Headphone amplifiers usually require positive and negative voltages. In this reference design, both voltages are generated from a single input voltage with an integrated split-rail charge-pump converter. It provides small solution size with five capacitors and four resistors.
Design guide: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
WSON (DSS) 12 Ultra Librarian
適用 TI 的評估品項標準條款與條件。

訂購與品質

內含資訊：
  • RoHS
  • REACH
  • 產品標記
  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 認證摘要
  • 進行中持續性的可靠性監測
內含資訊：
  • 晶圓廠位置
  • 組裝地點

支援與培訓

內含 TI 工程師技術支援的 TI E2E™ 論壇

以英文檢視所有論壇主題

內容係由 TI 和社群貢獻者依「現狀」提供，且不構成 TI 規範。檢視使用條款。

若有關於品質、封裝或訂購 TI 產品的問題，請參閱 TI 支援。​​​​​​​​​​​​​​

影片