|
|
PDF LM2750 Data sheet ( Hoja de datos )
| Número de pieza | LM2750 | |
| Descripción | Low Noise/ 5.0V Regulated Switched Capacitor Voltage Converter | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de LM2750 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
|
No Preview Available !
February 2003
LM2750
Low Noise, 5.0V Regulated Switched Capacitor Voltage
Converter
General Description
The LM2750 is a switched-capacitor doubler that produces a
low-noise, well regulated, 5.0V output. It can supply up to
120mA of output current over a 2.9V to 5.6V input range, as
well as up to 40mA of output current when the input voltage
is as low as 2.7V. The LM2750 has been placed in National’s
10-pin LLP, a package with excellent thermal properties that
keeps the part from overheating under almost all rated op-
erating conditions
A perfect fit for space-constrained, battery-powered applica-
tions, the LM2750 requires only 3 external components: one
input capacitor, one output capacitor, and one flying capaci-
tor. Small, inexpensive ceramic capacitors are recom-
mended for use. These capacitors, in conjunction with the
1.7MHz fixed switching frequency of the LM2750, yield low
output voltage ripple, beneficial for systems requiring a low-
noise 5V supply. Pre-regulation minimizes input current
ripple, reducing input noise to negligible levels.
A tightly controlled soft-start feature limits inrush currents
during part activation. Shutdown completely disconnects the
load from the input. Output current limiting and thermal
shutdown circuitry protect both the LM2750 and connected
devices in the event of output shorts or excessive current
loads.
Features
n Inductorless solution: Application requires only 3 small
ceramic capacitors
n Low Noise, 5.0V ± 4% Regulated Output
n 85% Peak Efficiency
70% Average Efficiency over Li-Ion Input Range
(2.9V-to-4.2V)
n Output Current up to 120mA with 2.9V ≤ VIN ≤ 5.6V
Output Current up to 40mA with 2.7V ≤ VIN ≤ 2.9V
n Wide Input Voltage Range: 2.7V to 5.6V
n Fixed 1.7MHz switching frequency for a low-noise,
low-ripple output signal
n Pre-regulation minimizes input current ripple, keeping
the battery line (VIN) virtually noise-free
n Tiny LLP package with outstanding power dissipation:
Usually no derating required.
n Shutdown Supply Current less than 2µA
Applications
n White and Colored LED-based Display Lighting
n Cellular Phone SIM cards
n Audio Amplifier Power Supplies
n General Purpose Li-Ion-to-5V Conversion
Typical Application Circuit
© 2003 National Semiconductor Corporation DS200351
20035101
www.national.com
1 page  
Typical Performance Characteristics Unless otherwise specified: VIN = 3.6V, TA = 25oC, CIN =
2.2µF, CFLY = 1.0µF, COUT = 2.2µF. Capacitors are low-ESR multi-layer ceramic capacitors (MLCC’s).
Output Voltage vs. Output Current
Output Voltage vs. Output Current
20035115
Output Voltage vs. Input Voltage
Power Efficiency
20035116
20035117
Input Current vs. Output Current
20035118
Quiescent Supply Current
20035119
5
20035120
www.national.com
5 Page 
Physical Dimensions inches (millimeters) unless otherwise noted
10-Pin LLP
NS Package Number LDA10A
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
National Semiconductor
Americas Customer
Support Center
Email: [email protected]
Tel: 1-800-272-9959
www.national.com
National Semiconductor
Europe Customer Support Center
Fax: +49 (0) 180-530 85 86
Email: [email protected]
Deutsch Tel: +49 (0) 69 9508 6208
English Tel: +44 (0) 870 24 0 2171
Français Tel: +33 (0) 1 41 91 8790
National Semiconductor
Asia Pacific Customer
Support Center
Fax: 65-6250 4466
Email: [email protected]
Tel: 65-6254 4466
National Semiconductor
Japan Customer Support Center
Fax: 81-3-5639-7507
Email: [email protected]
Tel: 81-3-5639-7560
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet LM2750.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| LM2750 | Low Noise/ 5.0V Regulated Switched Capacitor Voltage Converter | National Semiconductor |
| LM2750 | LM2750 Low-Noise Switched-Capacitor Boost Regulator (Rev. M) |  Texas Instruments |
| LM2750LD-5.0 | Low Noise/ 5.0V Regulated Switched Capacitor Voltage Converter | National Semiconductor |
| LM2750LDX-5.0 | Low Noise/ 5.0V Regulated Switched Capacitor Voltage Converter | National Semiconductor |
| 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 |