Datasheet LT8619, LT8619-5 (Analog Devices)
| Manufacturer | Analog Devices |
| Description | 60V, 1.2A Synchronous Monolithic Buck Regulator with 6μA Quiescent Current |
| Pages / Page | 28 / 1 — FEATURES. DESCRIPTION. Wide Input Voltage Range: 3V to 60V. Fast Minimum … |
| Revision | C |
| File Format / Size | PDF / 3.1 Mb |
| Document Language | English |
FEATURES. DESCRIPTION. Wide Input Voltage Range: 3V to 60V. Fast Minimum Switch-On Time: 30ns
Model Line for this Datasheet
- LT8619EDD#PBF LT8619EDD#TRPBF LT8619EMSE#PBF LT8619EMSE#TRPBF LT8619EMSE#WPBF LT8619EMSE#WTRPBF LT8619EMSE-5#PBF LT8619EMSE-5#TRPBF LT8619EMSE-5#WPBF LT8619EMSE-5#WTRPBF LT8619IDD#PBF LT8619IDD#TRPBF LT8619IMSE#PBF LT8619IMSE#TRPBF LT8619IMSE#WPBF LT8619IMSE#WTRPBF LT8619IMSE-5#PBF LT8619IMSE-5#TRPBF LT8619IMSE-5#WPBF LT8619IMSE-5#WTRPBF
Text Version of Document
LT8619/LT8619-5 60V, 1.2A Synchronous Monolithic Buck Regulator with 6µA Quiescent Current
FEATURES DESCRIPTION
n
Wide Input Voltage Range: 3V to 60V
The LT®8619 is a compact, high efficiency, high speed n
Fast Minimum Switch-On Time: 30ns
synchronous monolithic step-down switching regulator n
Ultralow Quiescent Current Burst Mode Operation:
that consumes only 6μA of quiescent current. The LT8619 n
6μA I
can deliver 1.2A of continuous current. Top and bottom
Q Regulating 12VIN to 3.3VOUT
n
10mV
power switches are included with all necessary circuitry
P-P Output Ripple at No Load
n
Synchronizable/Programmable Fixed Frequency
to minimize the need for external components. Low ripple
Forced Continuous Mode Operation: 300kHz
Burst Mode® operation enables high efficiency down to
to 2.2MHz
very low output currents while keeping the output ripple n
High Efficiency Synchronous Operation:
to 10mVP-P. A SYNC pin allows forced continuous mode n
92% Efficiency at 0.5A, 5V
operation synchronized to an external clock. Internal com-
OUT from 12VIN
n
90% Efficiency at 0.5A, 3.3V
pensation with peak current mode topology allows the use
OUT from 12VIN
n
Low Dropout: 360mV at 0.5A
of small inductors and results in fast transient response n
Low EMI
and good loop stability. The EN/UV pin has an accurate 1V n Accurate 1V Enable Pin Threshold threshold and can be used to program VIN undervoltage n Internal Soft-Start and Compensation lockout or to shut down the LT8619, reducing the input n Power Good Flag supply current to below 0.6μA. The PG flag signals when n Small Thermally Enhanced 16-Lead MSOP Package VOUT is within ±7.5% of the programmed output voltage. and 10-Lead (3mm × 3mm) DFN Packages The LT8619 is available in a small 16-lead MSOP and n AEC-Q100 Qualified for Automotive Applications 10-lead 3mm × 3mm DFN packages with exposed pad for low thermal resistance.
APPLICATIONS
All registered trademarks and trademarks are the property of their respective owners. n 12V Automotive Systems n 12V and 24V Commercial Vehicles n 48V Electric and Hybrid Vehicles n Industrial Supplies
TYPICAL APPLICATION 5V, 1.2A Step-Down Converter Efficiency at V Efficiency at VOUT OUT = 5V = 5V
100 10 V OSC f = 700kHz IN VIN BST 90 Burst Mode 6V TO 60V 2.2µF 0.1µF OPERATION LT8619-5 10µH 80 1 VOUT SW 5V 70 EFFICIENCY POWER LOSS (W) OFF ON 1.2A EN/UV 100k 60 0.1 INTVCC PG PG 50 1µF BIAS 40 POWER LOSS 0.01 EFFICIENCY (%) RT OUT 30 SYNC GND 22µF V = 48V 66.5k IN 8619 TA01a 20 V = 24V 0.001 IN V = 12V f 10 IN OSC = 700kHz L = 10µH, IHLP-2020BZ-01 0 0.0001 L = VISHAY IHLP-2020BZ-01 0.001 0.01 0.1 1 10 100 1k 10k COUT = TDK C3225X7R1C226K250 LOAD CURRENT (mA) 8619 TA01b Rev. C Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Revision History Typical Application Related Parts
FEATURES DESCRIPTION
n
Wide Input Voltage Range: 3V to 60V
The LT®8619 is a compact, high efficiency, high speed n
Fast Minimum Switch-On Time: 30ns
synchronous monolithic step-down switching regulator n
Ultralow Quiescent Current Burst Mode Operation:
that consumes only 6μA of quiescent current. The LT8619 n
6μA I
can deliver 1.2A of continuous current. Top and bottom
Q Regulating 12VIN to 3.3VOUT
n
10mV
power switches are included with all necessary circuitry
P-P Output Ripple at No Load
n
Synchronizable/Programmable Fixed Frequency
to minimize the need for external components. Low ripple
Forced Continuous Mode Operation: 300kHz
Burst Mode® operation enables high efficiency down to
to 2.2MHz
very low output currents while keeping the output ripple n
High Efficiency Synchronous Operation:
to 10mVP-P. A SYNC pin allows forced continuous mode n
92% Efficiency at 0.5A, 5V
operation synchronized to an external clock. Internal com-
OUT from 12VIN
n
90% Efficiency at 0.5A, 3.3V
pensation with peak current mode topology allows the use
OUT from 12VIN
n
Low Dropout: 360mV at 0.5A
of small inductors and results in fast transient response n
Low EMI
and good loop stability. The EN/UV pin has an accurate 1V n Accurate 1V Enable Pin Threshold threshold and can be used to program VIN undervoltage n Internal Soft-Start and Compensation lockout or to shut down the LT8619, reducing the input n Power Good Flag supply current to below 0.6μA. The PG flag signals when n Small Thermally Enhanced 16-Lead MSOP Package VOUT is within ±7.5% of the programmed output voltage. and 10-Lead (3mm × 3mm) DFN Packages The LT8619 is available in a small 16-lead MSOP and n AEC-Q100 Qualified for Automotive Applications 10-lead 3mm × 3mm DFN packages with exposed pad for low thermal resistance.
APPLICATIONS
All registered trademarks and trademarks are the property of their respective owners. n 12V Automotive Systems n 12V and 24V Commercial Vehicles n 48V Electric and Hybrid Vehicles n Industrial Supplies
TYPICAL APPLICATION 5V, 1.2A Step-Down Converter Efficiency at V Efficiency at VOUT OUT = 5V = 5V
100 10 V OSC f = 700kHz IN VIN BST 90 Burst Mode 6V TO 60V 2.2µF 0.1µF OPERATION LT8619-5 10µH 80 1 VOUT SW 5V 70 EFFICIENCY POWER LOSS (W) OFF ON 1.2A EN/UV 100k 60 0.1 INTVCC PG PG 50 1µF BIAS 40 POWER LOSS 0.01 EFFICIENCY (%) RT OUT 30 SYNC GND 22µF V = 48V 66.5k IN 8619 TA01a 20 V = 24V 0.001 IN V = 12V f 10 IN OSC = 700kHz L = 10µH, IHLP-2020BZ-01 0 0.0001 L = VISHAY IHLP-2020BZ-01 0.001 0.01 0.1 1 10 100 1k 10k COUT = TDK C3225X7R1C226K250 LOAD CURRENT (mA) 8619 TA01b Rev. C Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Revision History Typical Application Related Parts
