Datasheet LT8337 (Analog Devices)
| 制造商 | Analog Devices |
| 描述 | 28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru |
| 页数 / 页 | 25 / 1 — FEATURES. DESCRIPTION. Silent Switcher® Architecture. Ultralow EMI … |
| 文件格式/大小 | PDF / 2.5 Mb |
| 文件语言 | 英语 |
FEATURES. DESCRIPTION. Silent Switcher® Architecture. Ultralow EMI Emissions. Optional Spread Spectrum Frequency Modulation
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LT8337/LT8337-1 28V, 5A Low IQ Synchronous Step-Up Silent Switcher with PassThru
FEATURES DESCRIPTION
n
Silent Switcher® Architecture
The LT
®
8337/LT8337-1 is a low IQ, synchronous step- n
Ultralow EMI Emissions
up DC/DC converter. It features Silent Switcher architec- n
Optional Spread Spectrum Frequency Modulation
ture and optional spread spectrum frequency modula- n
Integrated 28V, 5A Power Switches
tion (SSFM) to minimize EMI emissions while delivering n
Wide Input Voltage Range: 2.7V to 28V
high efficiencies at high switching frequencies. n
Output Voltage Programmable Up to 26V
The wide input/output voltage range, low VIN pin quies- n
Low VIN Pin Quiescent Current
cent current in Burst Mode operation, and 100% duty- n
0.3µA in Shutdown
cycle capability for the synchronous MOSFET in PassThru n
4µA in Burst Mode® Operation (LT8337)
operation (VIN > VOUT) makes the LT8337/LT8337-1 ide- n
15µA in PassThru™ (LT8337)
ally suited for battery-powered systems and general pur- n
100% Duty Cycle Capability for Synchronous MOSFET
pose step-up applications. n
External Compensation: Fast Transient Response (LT8337-1)
The LT8337/LT8337-1 integrates 28V, 5A power switches, n Power Good Monitor (LT8337) operating at a fixed switching frequency programmable n Adjustable and Synchronizable: 300kHz to 3MHz between 300kHz and 3MHz and synchronizable to an n Pulse-Skipping or Burst Mode Operation at Light Load external clock. The LT8337/LT8337-1 features output n Small 16-Lead (3mm × 3mm) LQFN Package soft-start and output overvoltage lockout. The LT8337-1 allows external compensation via the VC pin
APPLICATIONS
for fast transient response. The LT8337 offers an output power good flag via the PG pin. n Battery-Powered Systems n General Purpose Step-Up All registered trademarks and trademarks are the property of their respective owners. Protected by U.S patents, including 10686381.
TYPICAL APPLICATION High Efficiency 5V to 13V Input, 2MHz, 15V Output Boost Converter
2.2µH
Efficiency
VIN 100 10000 5V TO 13V 22µF 0.1µF 90 VIN SW BST 80 1000 VOUT POWER LOSS (mW) EN/UVLO V 15V 70 OUT 1.2A AT 5V VIN 3A AT 13V V 60 100 IN PG LT8337 50 1M 40 10 22µF EFFICIENCY (%) SYNC/MODE FB 30 ×4 20 1 INTVCC RT GND 71.5k 10 VIN = 13V VIN = 5V 47.5k 1µF 0 0.1 2MHz 0.1 1 10 100 1000 10000 OUTPUT CURRENT (mA) 83371 TA01b 83371 TA01a Rev. A Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration 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
Silent Switcher® Architecture
The LT
®
8337/LT8337-1 is a low IQ, synchronous step- n
Ultralow EMI Emissions
up DC/DC converter. It features Silent Switcher architec- n
Optional Spread Spectrum Frequency Modulation
ture and optional spread spectrum frequency modula- n
Integrated 28V, 5A Power Switches
tion (SSFM) to minimize EMI emissions while delivering n
Wide Input Voltage Range: 2.7V to 28V
high efficiencies at high switching frequencies. n
Output Voltage Programmable Up to 26V
The wide input/output voltage range, low VIN pin quies- n
Low VIN Pin Quiescent Current
cent current in Burst Mode operation, and 100% duty- n
0.3µA in Shutdown
cycle capability for the synchronous MOSFET in PassThru n
4µA in Burst Mode® Operation (LT8337)
operation (VIN > VOUT) makes the LT8337/LT8337-1 ide- n
15µA in PassThru™ (LT8337)
ally suited for battery-powered systems and general pur- n
100% Duty Cycle Capability for Synchronous MOSFET
pose step-up applications. n
External Compensation: Fast Transient Response (LT8337-1)
The LT8337/LT8337-1 integrates 28V, 5A power switches, n Power Good Monitor (LT8337) operating at a fixed switching frequency programmable n Adjustable and Synchronizable: 300kHz to 3MHz between 300kHz and 3MHz and synchronizable to an n Pulse-Skipping or Burst Mode Operation at Light Load external clock. The LT8337/LT8337-1 features output n Small 16-Lead (3mm × 3mm) LQFN Package soft-start and output overvoltage lockout. The LT8337-1 allows external compensation via the VC pin
APPLICATIONS
for fast transient response. The LT8337 offers an output power good flag via the PG pin. n Battery-Powered Systems n General Purpose Step-Up All registered trademarks and trademarks are the property of their respective owners. Protected by U.S patents, including 10686381.
TYPICAL APPLICATION High Efficiency 5V to 13V Input, 2MHz, 15V Output Boost Converter
2.2µH
Efficiency
VIN 100 10000 5V TO 13V 22µF 0.1µF 90 VIN SW BST 80 1000 VOUT POWER LOSS (mW) EN/UVLO V 15V 70 OUT 1.2A AT 5V VIN 3A AT 13V V 60 100 IN PG LT8337 50 1M 40 10 22µF EFFICIENCY (%) SYNC/MODE FB 30 ×4 20 1 INTVCC RT GND 71.5k 10 VIN = 13V VIN = 5V 47.5k 1µF 0 0.1 2MHz 0.1 1 10 100 1000 10000 OUTPUT CURRENT (mA) 83371 TA01b 83371 TA01a Rev. A Document Feedback For more information www.analog.com 1 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts