Datasheet LT8390A (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 60V 2MHz Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum |
| Pages / Page | 30 / 1 — FEATURES. DESCRIPTION. 4-Switch Single Inductor Architecture Allows VIN. … |
| File Format / Size | PDF / 1.1 Mb |
| Document Language | English |
FEATURES. DESCRIPTION. 4-Switch Single Inductor Architecture Allows VIN. Above, Below or Equal to VOUT
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LT8390A 60V 2MHz Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum
FEATURES DESCRIPTION
n
4-Switch Single Inductor Architecture Allows VIN
The LT®8390A is a synchronous 4-switch buck-boost DC/DC
Above, Below or Equal to VOUT
controller that regulates output voltage, input or output n
Up to 95% Efficiency at 2MHz
current from an input voltage above, below, or equal to n
Proprietary Peak-Buck Peak-Boost Current Mode
the output voltage. The proprietary peak-buck peak-boost n
Wide VIN Range: 4V to 60V
current mode control scheme allows adjustable and syn- n
±1.5% Output Voltage Accuracy: 1V ≤ VOUT ≤ 60V
chronizable 600kHz to 2MHz fixed frequency operation, or n
±3% Input or Output Current Accuracy with Monitor
internal 25% triangle spread spectrum frequency modula- n
Spread Spectrum Frequency Modulation for Low EMI
tion for low EMI. With a 4V to 60V input voltage range, 0V n High Side PMOS Load Switch Driver to 60V output voltage capability, and seamless low noise n No Top MOSFET Refresh Noise in Buck or Boost transitions between operation regions, the LT8390A is ideal n Adjustable and Synchronizable: 600kHz to 2MHz for voltage regulator, battery and supercapacitor charger n VOUT Disconnected from VIN During Shutdown applications in automotive, industrial, telecom, and even n Available in 28-Lead TSSOP with Exposed Pad and battery-powered systems. 28-Lead QFN (4mm × 5mm) The LT8390A provides input or output current monitor and power good flag. Fault protection is also provided to
APPLICATIONS
detect output short-circuit condition, during which the n LT8390A retries, latches off, or keeps running. Automotive, Industrial, Telecom Systems n High Frequency Battery-Powered System L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION 95% Efficient 48W (12V 4A) 2MHz Buck-Boost Voltage Regulator
5mΩ 1µH 10mΩ VIN VOUT 6V TO 28V 12V 22µF CONTINUOUS 0.1µF 0.1µF 22µF 4A 4V TO 56V 63V 0.1µF SW1 LSP LSN SW2 0.1µF 16V 100V BST1 BST2 TRANSIENT 16V ×2 22µF ×2 ×2 16V
Efficiency vs VIN
4.7µF 100V INTVCC INTVCC 100 ×2 BG1 BG2 GND 90 TG1 TG2 LT8390A VIN VOUT 1µF 1µF 80 383k 10Ω EN/UVLO ISP 1µF 10Ω 70 169k LOADTG ISN 110k EFFICIENCY (%) IOUT = 4A TEST FB IOUT = 2A SSFM OFF 60 ISMON ISMON SYNC/SPRD 10k CONTINUOUS OPERATION WITH HIGHEST COMPONENT TEMPERATURE INTV CTRL INTV CC SSFM ON BELOW 90°C (T CC A = 25°C) 50 4.7µF 100k 133k LOADEN 100k 0 5 10 15 20 25 30 35 40 INPUT VOLTAGE (V) VREF PGOOD PGOOD 8390a TA01b 0.47µF SS VC RT 22nF 59.0k 10k 2MHz 2.2nF 8390a TA01a 8390afa For more information www.linear.com/LT8390A 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
FEATURES DESCRIPTION
n
4-Switch Single Inductor Architecture Allows VIN
The LT®8390A is a synchronous 4-switch buck-boost DC/DC
Above, Below or Equal to VOUT
controller that regulates output voltage, input or output n
Up to 95% Efficiency at 2MHz
current from an input voltage above, below, or equal to n
Proprietary Peak-Buck Peak-Boost Current Mode
the output voltage. The proprietary peak-buck peak-boost n
Wide VIN Range: 4V to 60V
current mode control scheme allows adjustable and syn- n
±1.5% Output Voltage Accuracy: 1V ≤ VOUT ≤ 60V
chronizable 600kHz to 2MHz fixed frequency operation, or n
±3% Input or Output Current Accuracy with Monitor
internal 25% triangle spread spectrum frequency modula- n
Spread Spectrum Frequency Modulation for Low EMI
tion for low EMI. With a 4V to 60V input voltage range, 0V n High Side PMOS Load Switch Driver to 60V output voltage capability, and seamless low noise n No Top MOSFET Refresh Noise in Buck or Boost transitions between operation regions, the LT8390A is ideal n Adjustable and Synchronizable: 600kHz to 2MHz for voltage regulator, battery and supercapacitor charger n VOUT Disconnected from VIN During Shutdown applications in automotive, industrial, telecom, and even n Available in 28-Lead TSSOP with Exposed Pad and battery-powered systems. 28-Lead QFN (4mm × 5mm) The LT8390A provides input or output current monitor and power good flag. Fault protection is also provided to
APPLICATIONS
detect output short-circuit condition, during which the n LT8390A retries, latches off, or keeps running. Automotive, Industrial, Telecom Systems n High Frequency Battery-Powered System L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their respective owners.
TYPICAL APPLICATION 95% Efficient 48W (12V 4A) 2MHz Buck-Boost Voltage Regulator
5mΩ 1µH 10mΩ VIN VOUT 6V TO 28V 12V 22µF CONTINUOUS 0.1µF 0.1µF 22µF 4A 4V TO 56V 63V 0.1µF SW1 LSP LSN SW2 0.1µF 16V 100V BST1 BST2 TRANSIENT 16V ×2 22µF ×2 ×2 16V
Efficiency vs VIN
4.7µF 100V INTVCC INTVCC 100 ×2 BG1 BG2 GND 90 TG1 TG2 LT8390A VIN VOUT 1µF 1µF 80 383k 10Ω EN/UVLO ISP 1µF 10Ω 70 169k LOADTG ISN 110k EFFICIENCY (%) IOUT = 4A TEST FB IOUT = 2A SSFM OFF 60 ISMON ISMON SYNC/SPRD 10k CONTINUOUS OPERATION WITH HIGHEST COMPONENT TEMPERATURE INTV CTRL INTV CC SSFM ON BELOW 90°C (T CC A = 25°C) 50 4.7µF 100k 133k LOADEN 100k 0 5 10 15 20 25 30 35 40 INPUT VOLTAGE (V) VREF PGOOD PGOOD 8390a TA01b 0.47µF SS VC RT 22nF 59.0k 10k 2MHz 2.2nF 8390a TA01a 8390afa For more information www.linear.com/LT8390A 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
