Datasheet LT8210 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 100V VIN and VOUT Synchronous 4-Switch Buck‑Boost DC/DC Controller with Pass-Thru |
| Pages / Page | 46 / 1 — FEATURES. DESCRIPTION. Pin-Selectable Pass-Thru or Fixed Output CCM,. … |
| Revision | A |
| File Format / Size | PDF / 6.1 Mb |
| Document Language | English |
FEATURES. DESCRIPTION. Pin-Selectable Pass-Thru or Fixed Output CCM,. DCM, Burst Mode. Operation
Model Line for this Datasheet
Text Version of Document
LT8210 100V VIN and VOUT Synchronous 4-Switch Buck-Boost DC/DC Controller with Pass-Thru
FEATURES DESCRIPTION
n
Pin-Selectable Pass-Thru or Fixed Output CCM,
The LT®8210 is a 4-switch synchronous buck-boost
DCM, Burst Mode
®
Operation
DC/DC control er that can operate in pass-thru, forced n
Programmable Non-Switching Pass-Thru Window
continuous, pulse-skipping and Burst Mode® operation. n
18μA Pass-Thru Mode IQ with 99.9% Efficiency
Pass-Thru is a feature that passes the input directly to n
VIN Range: 2.8V to 100V (4.5V for Start-Up)
the output when the input is within a user programmable n
VOUT Range: 1V to 100V
window. Pass-Thru mode eliminates switching losses and n
Reverse Input Protection to –40V
EMI along with maximizing efficiency. For input voltages n
±1.25% Output Voltage Accuracy (–40°C to 125°C)
above or below the pass-thru window, the buck or boost n
±3% Accurate Current Monitoring
regulation loops maintain the output at the set maximum n
±5% Accurate Current Regulation
or minimum values, respectively. n
10V Quad N-Channel MOSFET Gate Drivers
The GATEVCC driver supply is regulated to 10.6V allow- n EXTVCC LDO Powers Drivers from VOUT/External Rail ing the use of standard-level MOSFETs and can be pow- n ±20% Cycle-by-Cycle Inductor Current Limit ered through the EXTVCC pin for improved efficiency. The n No Top MOSFET Refresh Noise in Buck or Boost GATEVCC regulator is back-drive-protected to ride through n Fixed/Phase-Lockable Frequency: 80kHz to 400kHz input brownouts while maintaining regulation. Optional n Spread Spectrum Frequency Modulation for Low EMI reverse input protection down to –40V can be imple- n Power Good Output Voltage/Overcurrent Monitor mented with the addition of a single N-channel MOSFET. n Available in a 38-Lead TSSOP and 40-Lead (6mm x The LT8210 includes a precision current sense ampli- 6mm) QFN Packages fier that can accurately monitor and limit output or input average current.
APPLICATIONS
All registered trademarks and trademarks are the property of their respective owners. Protected n Automotive, Industrial, Telecom, Avionics Systems by U.S. patents, including 10135340. n Automotive Start-Stop, Emergency Call Applications n ISO 7637, ISO 16750, MIL-1275, DO-160 Applications
TYPICAL APPLICATION
A 4m 4.7µH D 4m VIN
Pass-Thru Transfer Characteristic
VOUT REGULATES: 8V TO 16V
(V
4V TO 100V
OUT(BOOST) = 8V, VOUT(BUCK) = 16V)
B C 5A + +
Transfer Characteristic
SURVIVES: –40V TO 220µF 10µF 0.1µF 22µF 0.1µF 220µF 36 100 100V ×2 ×2 96 TG1 BST1 SW1 BG1 SNSP1 SNSN1 PGND BG2 SW2 BST2 TG2 PASS– THRU EFFICIENCY (%) V 24 INP SNSP2 REGION DG 92 SNSN2 VIN EXTVCC TAGE (V) EN/UVLO VOUT 88 VOL BST1 GATEVCC LT8210 100k 12 V BST2 DD FB1 MODE1 7.15k 84 VIN MODE2 FB2 100k VOUT PWGD V EFFICIENCY DD 7.15k SYNC/ 0 80 4.7µF 2.2µF SPRD RT SS GND VC1 VC2 IMON 4 8 12 16 20 24 38.3k 59k 8210 TA01a INPUT VOLTAGE (V) 71.5k 15nF 8210 TA01b 46.4k 1nF 330pF 4.7nF 100pF 2.2nF Rev. A Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n
Pin-Selectable Pass-Thru or Fixed Output CCM,
The LT®8210 is a 4-switch synchronous buck-boost
DCM, Burst Mode
®
Operation
DC/DC control er that can operate in pass-thru, forced n
Programmable Non-Switching Pass-Thru Window
continuous, pulse-skipping and Burst Mode® operation. n
18μA Pass-Thru Mode IQ with 99.9% Efficiency
Pass-Thru is a feature that passes the input directly to n
VIN Range: 2.8V to 100V (4.5V for Start-Up)
the output when the input is within a user programmable n
VOUT Range: 1V to 100V
window. Pass-Thru mode eliminates switching losses and n
Reverse Input Protection to –40V
EMI along with maximizing efficiency. For input voltages n
±1.25% Output Voltage Accuracy (–40°C to 125°C)
above or below the pass-thru window, the buck or boost n
±3% Accurate Current Monitoring
regulation loops maintain the output at the set maximum n
±5% Accurate Current Regulation
or minimum values, respectively. n
10V Quad N-Channel MOSFET Gate Drivers
The GATEVCC driver supply is regulated to 10.6V allow- n EXTVCC LDO Powers Drivers from VOUT/External Rail ing the use of standard-level MOSFETs and can be pow- n ±20% Cycle-by-Cycle Inductor Current Limit ered through the EXTVCC pin for improved efficiency. The n No Top MOSFET Refresh Noise in Buck or Boost GATEVCC regulator is back-drive-protected to ride through n Fixed/Phase-Lockable Frequency: 80kHz to 400kHz input brownouts while maintaining regulation. Optional n Spread Spectrum Frequency Modulation for Low EMI reverse input protection down to –40V can be imple- n Power Good Output Voltage/Overcurrent Monitor mented with the addition of a single N-channel MOSFET. n Available in a 38-Lead TSSOP and 40-Lead (6mm x The LT8210 includes a precision current sense ampli- 6mm) QFN Packages fier that can accurately monitor and limit output or input average current.
APPLICATIONS
All registered trademarks and trademarks are the property of their respective owners. Protected n Automotive, Industrial, Telecom, Avionics Systems by U.S. patents, including 10135340. n Automotive Start-Stop, Emergency Call Applications n ISO 7637, ISO 16750, MIL-1275, DO-160 Applications
TYPICAL APPLICATION
A 4m 4.7µH D 4m VIN
Pass-Thru Transfer Characteristic
VOUT REGULATES: 8V TO 16V
(V
4V TO 100V
OUT(BOOST) = 8V, VOUT(BUCK) = 16V)
B C 5A + +
Transfer Characteristic
SURVIVES: –40V TO 220µF 10µF 0.1µF 22µF 0.1µF 220µF 36 100 100V ×2 ×2 96 TG1 BST1 SW1 BG1 SNSP1 SNSN1 PGND BG2 SW2 BST2 TG2 PASS– THRU EFFICIENCY (%) V 24 INP SNSP2 REGION DG 92 SNSN2 VIN EXTVCC TAGE (V) EN/UVLO VOUT 88 VOL BST1 GATEVCC LT8210 100k 12 V BST2 DD FB1 MODE1 7.15k 84 VIN MODE2 FB2 100k VOUT PWGD V EFFICIENCY DD 7.15k SYNC/ 0 80 4.7µF 2.2µF SPRD RT SS GND VC1 VC2 IMON 4 8 12 16 20 24 38.3k 59k 8210 TA01a INPUT VOLTAGE (V) 71.5k 15nF 8210 TA01b 46.4k 1nF 330pF 4.7nF 100pF 2.2nF Rev. A Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Revision History Typical Application Related Parts
