LM2750LDX-5.0 Datasheet PDF - National Semiconductor
| Part Number | LM2750LDX-5.0 | |
| Description | Low Noise/ 5.0V Regulated Switched Capacitor Voltage Converter | |
| Manufacturers | National Semiconductor | |
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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
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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
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for LM2750LDX-5.0 electronic component. |
| Information | Total 11 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ LM2750LDX-5.0.PDF Datasheet ] | |
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Featured Datasheets
| Part Number | Description | MFRS |
| LM2750LDX-5.0 | The function is Low Noise/ 5.0V Regulated Switched Capacitor Voltage Converter. National Semiconductor | |
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