|
|
PDF LM5009A Data sheet ( Hoja de datos )
| Número de pieza | LM5009A | |
| Descripción | 150 mA Constant On-Time Buck Switching Regulator | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LM5009A (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
LM5009A
June 26, 2009
100V, 150 mA Constant On-Time Buck Switching Regulator
General Description
The LM5009A is a functional variant of the LM5009 COT Buck
Switching Regulator. The functional differences of the
LM5009A are: The minimum input operating voltage is 6 volts,
the on-time equation is slightly different, and the requirement
for a minimum load current is removed.
The LM5009A Step Down Switching Regulator features all of
the functions needed to implement a low cost, efficient, Buck
bias regulator. This high voltage regulator contains an 100 V
N-Channel Buck Switch. The device is easy to implement and
is provided in the MSOP-8 and the thermally enhanced LLP-8
packages. The regulator is based on a control scheme using
an ON time inversely proportional to VIN. This feature allows
the operating frequency to remain relatively constant. The
control scheme requires no loop compensation. An intelligent
current limit is implemented with forced OFF time, which is
inversely proportional to Vout. This scheme ensures short
circuit control while providing minimum foldback. Other fea-
tures include: Thermal Shutdown, VCC under-voltage lockout,
Gate drive under-voltage lockout, Max Duty Cycle limiter, and
a pre-charge switch.
Features
■ Operating input voltage range: 6V to 95V
■ Integrated 100V, N-Channel buck switch
■ Internal start-up regulator
■ No loop compensation required
■ Ultra-Fast transient response
■ On time varies inversely with input voltage
■ Operating frequency remains constant with varying line
voltage and load current
■ Adjustable output voltage from 2.5V
■ Highly efficient operation
■ Precision internal reference
■ Low bias current
■ Intelligent current limit
■ Thermal shutdown
Typical Applications
■ Non-Isolated Telecommunication Buck Regulator
■ Secondary High Voltage Post Regulator
■ +42V Automotive Systems
Package
■ MSOP - 8
■ LLP - 8 (4mm x 4mm)
Typical Application, Basic Step-Down Regulator
© 2009 National Semiconductor Corporation 300871
30087101
www.national.com
1 page  
wwTwy.DpatiacSaheletP4Ue.crofmormance Characteristics
Efficiency vs. Load Current and VIN
(Circuit of Figure 4)
VCC vs. VIN
30087124
ON-Time vs Input Voltage and RT
30087105
Current Limit Off-Time vs. VFB and RCL
30087125
Maximum Frequency vs. VOUT and VIN
30087107
ICC Current vs. Applied VCC Voltage
30087126
5
30087127
www.national.com
5 Page 
www.DataSheet4U.com
FIGURE 4. LM5009A Example Circuit
Bill of Materials
Item
C1
C2
C3
C4
C5
D1
L1
Description
Ceramic Capacitor
Ceramic Capacitor
Ceramic Capacitor
Ceramic Capacitor
Ceramic Capacitor
Schottky Power Diode
Power Inductor
RFB2
RFB1
R3
RT
RCL
U1
Resistor
Resistor
Resistor
Resistor
Resistor
Switching Regulator
Part Number
TDK C4532X7R2A105M
TDK C4532X7R1E226M
Kemet C1206C474K5RAC
Kemet C1206C103K5RAC
TDK C3216X7R2A104M
Diodes Inc. DFLS1100
COILTRONICS DR125-221-R, or
TDK SLF10145T-221MR65
Vishay CRCW12063011F
Vishay CRCW12061001F
Vishay CRCW12063R30F
Vishay CRCW12063093F
Vishay CRCW12063163F
National Semiconductor LM5009A
30087118
Value
1 µF, 100V
22 µF, 25V
0.47 µF, 50V
0.01 µF, 50V
0.1 µF, 100V
100V, 1A
220 µH
3.01 kΩ
1.0 kΩ
3.3 Ω
309 kΩ
316 kΩ
11 www.national.com
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet LM5009A.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LM5009 | LM5009 Wide Input 100-V150-mA Step-Down Switching Regulator (Rev. H) |  Texas Instruments |
| LM5009 | 100V Step-Down Switching Regulator | National Semiconductor |
| LM5009 | 100V Step-Down Switching Regulator | National Semiconductor |
| LM5009A | LM5009A 100V 150 mA Constant On-Time Buck Switching Regulator (Rev. G) | Texas Instruments |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |