Datasheet LTM8045 (Analog Devices)
| Hersteller | Analog Devices |
| Beschreibung | Inverting or SEPIC μModule (Power Module) DC/DC Converter with Up to 700mA Output Current |
| Seiten / Seite | 22 / 1 — FeaTures. DescripTion. SEPIC or Inverting Topology. Wide Input Voltage … |
| Dateiformat / Größe | PDF / 361 Kb |
| Dokumentensprache | Englisch |
FeaTures. DescripTion. SEPIC or Inverting Topology. Wide Input Voltage Range: 2.8V to 18V
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LTM8045 Inverting or SEPIC µModule DC/DC Converter with Up to 700mA Output Current
FeaTures DescripTion
n
SEPIC or Inverting Topology
The LTM®8045 is a µModule® (micromodule) DC/DC n
Wide Input Voltage Range: 2.8V to 18V
converter that can be configured as a SEPIC or inverting n
Up to 700mA Output Current at VIN = 12V,
converter by simply grounding the appropriate output rail.
VOUT = 2.5V or –2.5V
In a SEPIC configuration the regulated output voltage can n
Up to 375mA Output Current at VIN = 12V,
be above, below or equal to the input voltage. The LTM8045
VOUT =15V or –15V
includes power devices, inductors, control circuitry and n
2.5V to 15V or –2.5V to –15V Output Voltage
passive components. All that is needed to complete the n
Selectable Switching Frequency: 200kHz to 2MHz
design are input and output capacitors, and small resis- n Programmable Soft-Start tors to set the output voltage and switching frequency. n User Configurable Undervoltage Lockout Other components may be used to control the soft-start n 6.25mm × 11.25mm × 4.92mm BGA Package and undervoltage lockout. The LTM8045 is packaged in a compact (6.25mm ×
applicaTions
11.25mm) overmolded ball grid array (BGA) package suit- able for automated assembly by standard surface mount n Battery Powered Regulator equipment. The LTM8045 is available with SnPb (BGA) n Local Negative Voltage Regulator or RoHS compliant terminal finish. n Low Noise Amplifier Power L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Typical applicaTion Use Two LTM8045s to Generate ±5V
LTM8045
Maximum Output Current
– V V V
vs Input Voltage
IN IN • • OUT VOUT 2.8VDC TO 18VDC –5V 800 4.7µF RUN 60.4k SS 700 RT FB 22µF 600 SYNC V + 130k OUT GND 500 400 ±2.5VOUT 300 ±3.3VOUT LTM8045 OUTPUT CURRENT (mA) ±5VOUT ±8VOUT V – 200 IN • • VOUT ±12VOUT ±15VOUT RUN 100 2 4 6 8 10 12 14 16 18 SS FB 100µF INPUT VOLTAGE (V) 8045 TA01b RT 45.3k SYNC V + 115k OUT VOUT GND 5V 8045 TA01b 8045fc For more information www.linear.com/LTM8045 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Photo Package Description Revision History Typical Application Related Parts
FeaTures DescripTion
n
SEPIC or Inverting Topology
The LTM®8045 is a µModule® (micromodule) DC/DC n
Wide Input Voltage Range: 2.8V to 18V
converter that can be configured as a SEPIC or inverting n
Up to 700mA Output Current at VIN = 12V,
converter by simply grounding the appropriate output rail.
VOUT = 2.5V or –2.5V
In a SEPIC configuration the regulated output voltage can n
Up to 375mA Output Current at VIN = 12V,
be above, below or equal to the input voltage. The LTM8045
VOUT =15V or –15V
includes power devices, inductors, control circuitry and n
2.5V to 15V or –2.5V to –15V Output Voltage
passive components. All that is needed to complete the n
Selectable Switching Frequency: 200kHz to 2MHz
design are input and output capacitors, and small resis- n Programmable Soft-Start tors to set the output voltage and switching frequency. n User Configurable Undervoltage Lockout Other components may be used to control the soft-start n 6.25mm × 11.25mm × 4.92mm BGA Package and undervoltage lockout. The LTM8045 is packaged in a compact (6.25mm ×
applicaTions
11.25mm) overmolded ball grid array (BGA) package suit- able for automated assembly by standard surface mount n Battery Powered Regulator equipment. The LTM8045 is available with SnPb (BGA) n Local Negative Voltage Regulator or RoHS compliant terminal finish. n Low Noise Amplifier Power L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
Typical applicaTion Use Two LTM8045s to Generate ±5V
LTM8045
Maximum Output Current
– V V V
vs Input Voltage
IN IN • • OUT VOUT 2.8VDC TO 18VDC –5V 800 4.7µF RUN 60.4k SS 700 RT FB 22µF 600 SYNC V + 130k OUT GND 500 400 ±2.5VOUT 300 ±3.3VOUT LTM8045 OUTPUT CURRENT (mA) ±5VOUT ±8VOUT V – 200 IN • • VOUT ±12VOUT ±15VOUT RUN 100 2 4 6 8 10 12 14 16 18 SS FB 100µF INPUT VOLTAGE (V) 8045 TA01b RT 45.3k SYNC V + 115k OUT VOUT GND 5V 8045 TA01b 8045fc For more information www.linear.com/LTM8045 1 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Photo Package Description Revision History Typical Application Related Parts