 LD49300PT Product Page
As the speed, complexity and performance of modern
systems increase, their dynamic loading requirements
on voltage regulators become even harsher.
The solution to meet ever-increasing demand for future
systems, is a fully integrated regulator with ultra
fast transient response.
The LD49300 optimized for low-voltage, high current
applications in set-top boxes, servers and desktop
PCs, is a high-bandwidth, low-dropout, 3Amp voltage
regulator ideal for powering core voltages of lowpower
microprocessors. It consumes only 5mA of
quiescent current without compromising transient
response.
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 Ultra low drop voltage
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200mV over temp at 1.5A
400mV over temp at 3A |
Two separate input pins to minimize the power
dissipation
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Vin from 1.4V to 5.5V to supply power to the load
Vbias from 3V to 6V to supply the IC |
Ultra fast transient response
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Bandwidth up to 10MHz |
3A guaranteed output current
Fixed or adjustable output voltage
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Adj down to 0.8V
Fixed 0.8V, 1.0V, 1.2V |
1.5% output voltage tolerance
Stable with 1μF capacitors
6V absolute max input voltage
Operating temperature range from -25 to 125°C
Current and thermal protection
PPAK package
Typical application circuit
of LD49300
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The LD49300 implements a dual supply configuration,
providing very low output impedance and very fast
transient response.
This regulator requires a bias input supply and a main
input supply, allowing ultra-low drop voltage on the
main supply rail. The input supply operates from 1.4V
to 6V and the bias supply requires between 3V and
6V for proper operation.
The LD49300 offers the most common fixed output
voltages and adjustable output voltages down to 0.8V,
giving designers a linear alternative to noisy and
expensive switching regulators. The LD49300 requires
at least a 1μF output capacitance to ensure stability.
Specific capacitor selection could however be needed
to ensure the transient response.
Block diagram of LD49300
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Part Number
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Vout |
Package |
LD49300PT08R |
0.8V / ADJ |
PPAK |
LD49300PT10R |
1V |
LD49300PT12 |
1.2V |
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