Datasheet LT8607, LT8607B (Analog Devices)
| Fabricante | Analog Devices |
| Descripción | 42V, 750mA Synchronous Step-Down Regulator with 2.5µA Quiescent Current |
| Páginas / Página | 24 / 1 — FEATURES. DESCRIPTION. Wide Input Voltage Range: 3.0V to 42V. Ultralow … |
| Revisión | D |
| Formato / tamaño de archivo | PDF / 3.0 Mb |
| Idioma del documento | Inglés |
FEATURES. DESCRIPTION. Wide Input Voltage Range: 3.0V to 42V. Ultralow Quiescent Current Burst Mode. Operation
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Versión de texto del documento
LT8607/LT8607B 42V, 750mA Synchronous Step-Down Regulator with 2.5µA Quiescent Current
FEATURES DESCRIPTION
n
Wide Input Voltage Range: 3.0V to 42V
The LT®8607 is a compact, high efficiency, high speed syn- n
Ultralow Quiescent Current Burst Mode
®
Operation
chronous monolithic step-down switching regulator that n
<3µA IQ Regulating 12VIN to 3.3VOUT
consumes only 1.7µA of non-switching quiescent current. n
Output Ripple <10mV
The LT8607 can deliver 750mA of continuous current.
P-P
n
High Efficiency 2MHz Synchronous Operation
Burst Mode operation enables high efficiency down to very n
>93% Efficiency at 0.5A, 12V
low output currents while keeping the output ripple below
IN to 5VOUT
n
750mA Maximum Continuous Output
10mVP-P. Internal compensation with peak current mode n
Fast Minimum Switch-On Time: 35ns
topology allows the use of small inductors and results in n
LT8607 Available in Fixed 5V Output
fast transient response and good loop stability. The EN/UV n
Adjustable and Synchronizable: 200kHz to 2.2MHz
pin has an accurate 1V threshold and can be used to pro- n
Spread Spectrum Frequency Modulation for Low EMI
gram VIN undervoltage lockout or to shut down the LT8607 n Allows Use of Small Inductors reducing the input supply current to 1µA. n Low Dropout The MSOP package includes a SYNC pin to synchronize n Peak Current Mode Operation to an external clock, or to select Burst Mode operation n Accurate 1V Enable Pin Threshold or pulse-skipping with or without spread spectrum; the n Internal Compensation TR/SS pin programs soft-start or tracking. The DFN n Output Soft-Start and Tracking package omits these pins and can be purchased in pulse- n Small Thermally Enhanced 10-Lead MSOP Package skipping or Burst Mode operation. or 8-Lead 2mm × 2mm DFN Package
PART NUMBER PACKAGE OUTPUT VOLTAGE SYNC FUNCTIONALITY
n AEC-Q100 Qualified for Automotive Applications LT8607MSE MSE Programmable Programmable
APPLICATIONS
LT8607-5MSE MSE Fixed 5V Out Programmable LT8607DFN DFN Programmable Burst Mode Operation General Purpose Step-Down Converter LT8607BDFN DFN Programmable Pulse-Skipping Mode Low EMI Step Down All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION 12VIN to 5VOUT Efficiency 5V, 2MHz Step-Down
100 95 VIN VIN BST 5.7V TO 42V 90 EN/UV 0.1µF 4.7µF 4.7µH VOUT 85 SYNC SW 5V 750mA 80 LT8607 100k 75 POWER INTV PG CC 10pF GOOD 70 EFFICIENCY (%) 1µF TR/SS 65 RT FB 60 10nF 1MΩ 22µF L = 4.7µH GND 187k 55 18.2k X7R fSW = 2MHz 8607 TA01a 1206 50 0 125 250 375 500 625 750 fSW = 2MHz IOUT (mA) 8607 TA01b Rev. D Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n
Wide Input Voltage Range: 3.0V to 42V
The LT®8607 is a compact, high efficiency, high speed syn- n
Ultralow Quiescent Current Burst Mode
®
Operation
chronous monolithic step-down switching regulator that n
<3µA IQ Regulating 12VIN to 3.3VOUT
consumes only 1.7µA of non-switching quiescent current. n
Output Ripple <10mV
The LT8607 can deliver 750mA of continuous current.
P-P
n
High Efficiency 2MHz Synchronous Operation
Burst Mode operation enables high efficiency down to very n
>93% Efficiency at 0.5A, 12V
low output currents while keeping the output ripple below
IN to 5VOUT
n
750mA Maximum Continuous Output
10mVP-P. Internal compensation with peak current mode n
Fast Minimum Switch-On Time: 35ns
topology allows the use of small inductors and results in n
LT8607 Available in Fixed 5V Output
fast transient response and good loop stability. The EN/UV n
Adjustable and Synchronizable: 200kHz to 2.2MHz
pin has an accurate 1V threshold and can be used to pro- n
Spread Spectrum Frequency Modulation for Low EMI
gram VIN undervoltage lockout or to shut down the LT8607 n Allows Use of Small Inductors reducing the input supply current to 1µA. n Low Dropout The MSOP package includes a SYNC pin to synchronize n Peak Current Mode Operation to an external clock, or to select Burst Mode operation n Accurate 1V Enable Pin Threshold or pulse-skipping with or without spread spectrum; the n Internal Compensation TR/SS pin programs soft-start or tracking. The DFN n Output Soft-Start and Tracking package omits these pins and can be purchased in pulse- n Small Thermally Enhanced 10-Lead MSOP Package skipping or Burst Mode operation. or 8-Lead 2mm × 2mm DFN Package
PART NUMBER PACKAGE OUTPUT VOLTAGE SYNC FUNCTIONALITY
n AEC-Q100 Qualified for Automotive Applications LT8607MSE MSE Programmable Programmable
APPLICATIONS
LT8607-5MSE MSE Fixed 5V Out Programmable LT8607DFN DFN Programmable Burst Mode Operation General Purpose Step-Down Converter LT8607BDFN DFN Programmable Pulse-Skipping Mode Low EMI Step Down All registered trademarks and trademarks are the property of their respective owners.
TYPICAL APPLICATION 12VIN to 5VOUT Efficiency 5V, 2MHz Step-Down
100 95 VIN VIN BST 5.7V TO 42V 90 EN/UV 0.1µF 4.7µF 4.7µH VOUT 85 SYNC SW 5V 750mA 80 LT8607 100k 75 POWER INTV PG CC 10pF GOOD 70 EFFICIENCY (%) 1µF TR/SS 65 RT FB 60 10nF 1MΩ 22µF L = 4.7µH GND 187k 55 18.2k X7R fSW = 2MHz 8607 TA01a 1206 50 0 125 250 375 500 625 750 fSW = 2MHz IOUT (mA) 8607 TA01b Rev. D Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts