Datasheet LT3790 (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | 60V Synchronous 4-Switch Buck-Boost Controller |
| Páginas / Página | 28 / 1 — FEATURES. DESCRIPTION. 4-Switch Single Inductor Architecture Allows VIN. … |
| Formato / tamaño de archivo | PDF / 535 Kb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. 4-Switch Single Inductor Architecture Allows VIN. Above, Below or Equal to VOUT
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LT3790 60V Synchronous 4-Switch Buck-Boost Controller
FEATURES DESCRIPTION
n
4-Switch Single Inductor Architecture Allows VIN
The LT®3790 is a synchronous 4-switch buck-boost volt-
Above, Below or Equal to VOUT
age/current regulator controller. The LT3790 can regulate n
Synchronous Switching: Up to 98.5% Efficiency
output voltage, output current, or input current with input n
Wide VIN Range: 4.7V to 60V
voltages above, below, or equal to the output voltage. The n
2% Output Voltage Accuracy: 1.2V ≤ VOUT < 60V
constant-frequency, current mode architecture allows its n
6% Output Current Accuracy: 0V ≤ VOUT < 60V
frequency to be adjusted or synchronized from 200kHz n Input and Output Current Regulation with Current to 700kHz. No top FET refresh switching cycle is needed Monitor Outputs in buck or boost operation. With 60V input, 60V output n No Top FET Refresh in Buck or Boost capability and seamless transitions between operating n VOUT Disconnected from VIN During Shutdown regions, the LT3790 is ideal for voltage regulator, bat- n C/10 Charge Termination and Output Shorted Flags tery/super-capacitor charger applications in automotive, n Capable of 100W or Greater per IC industrial, telecom, and even battery-powered systems. n Easy Parallel Capability to Extend Output Power The LT3790 provides input current monitor, output current n 38-Lead TSSOP with Exposed Pad monitor, and various status flags, such as C/10 charge termination and shorted output flag.
APPLICATIONS
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Automotive, Telecom, Industrial Systems n High Power Battery-Powered System
TYPICAL APPLICATION 120W (24V 5A) Buck-Boost Voltage Regulator
VIN 0.003Ω 12V TO 58V + 4.7µF 47µF VIN INTVCC 100V 80V 1µF 4.7µF 51Ω BST2 + IVINN 220µF 470nF 35V
Efficiency vs Load Current
IVINP 0.009Ω V BST1 0.1µF OUT 24V 100 499k 499k 4.7µF 5A TG1 0.1µF 50V 95 EN/UVLO ×2 SWI 73.2k OVLO 10µH 90 BG1 56.2k 27.4k INTVCC 85 3.83k LT3790 SNSP 100k 200k 80 SHORT 0.004Ω C/10 EFFICIENCY (%) 75 SNSN CCM PGND 70 IVINMON VIN = 12V BG2 ISMON 65 VIN = 24V CLKOUT SW2 VIN = 54V 60 PWMOUT TG2 0 1 2 3 4 5 VREF ISP LOAD CURRENT (A) 0.1µF PWM ISN 3790 TA01b 100k CTRL SS SYNC V FB C RT SGND 3790 TA01a 3.3k 147k 33nF 200kHz 33nF 3790fa For more information www.linear.com/LT3790 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts
FEATURES DESCRIPTION
n
4-Switch Single Inductor Architecture Allows VIN
The LT®3790 is a synchronous 4-switch buck-boost volt-
Above, Below or Equal to VOUT
age/current regulator controller. The LT3790 can regulate n
Synchronous Switching: Up to 98.5% Efficiency
output voltage, output current, or input current with input n
Wide VIN Range: 4.7V to 60V
voltages above, below, or equal to the output voltage. The n
2% Output Voltage Accuracy: 1.2V ≤ VOUT < 60V
constant-frequency, current mode architecture allows its n
6% Output Current Accuracy: 0V ≤ VOUT < 60V
frequency to be adjusted or synchronized from 200kHz n Input and Output Current Regulation with Current to 700kHz. No top FET refresh switching cycle is needed Monitor Outputs in buck or boost operation. With 60V input, 60V output n No Top FET Refresh in Buck or Boost capability and seamless transitions between operating n VOUT Disconnected from VIN During Shutdown regions, the LT3790 is ideal for voltage regulator, bat- n C/10 Charge Termination and Output Shorted Flags tery/super-capacitor charger applications in automotive, n Capable of 100W or Greater per IC industrial, telecom, and even battery-powered systems. n Easy Parallel Capability to Extend Output Power The LT3790 provides input current monitor, output current n 38-Lead TSSOP with Exposed Pad monitor, and various status flags, such as C/10 charge termination and shorted output flag.
APPLICATIONS
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Automotive, Telecom, Industrial Systems n High Power Battery-Powered System
TYPICAL APPLICATION 120W (24V 5A) Buck-Boost Voltage Regulator
VIN 0.003Ω 12V TO 58V + 4.7µF 47µF VIN INTVCC 100V 80V 1µF 4.7µF 51Ω BST2 + IVINN 220µF 470nF 35V
Efficiency vs Load Current
IVINP 0.009Ω V BST1 0.1µF OUT 24V 100 499k 499k 4.7µF 5A TG1 0.1µF 50V 95 EN/UVLO ×2 SWI 73.2k OVLO 10µH 90 BG1 56.2k 27.4k INTVCC 85 3.83k LT3790 SNSP 100k 200k 80 SHORT 0.004Ω C/10 EFFICIENCY (%) 75 SNSN CCM PGND 70 IVINMON VIN = 12V BG2 ISMON 65 VIN = 24V CLKOUT SW2 VIN = 54V 60 PWMOUT TG2 0 1 2 3 4 5 VREF ISP LOAD CURRENT (A) 0.1µF PWM ISN 3790 TA01b 100k CTRL SS SYNC V FB C RT SGND 3790 TA01a 3.3k 147k 33nF 200kHz 33nF 3790fa For more information www.linear.com/LT3790 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts