ep53f8qi-t Enpirion, ep53f8qi-t Datasheet - Page 7

• Manufacturer Part Number: ep53f8qi-t
• Description: 1500 Ma Synchronous Buck Pwm Dc-dc Converter With Integrated Inductor
• Manufacturer: Enpirion

01542
Functional Block Diagram
Functional Description
The EP53F8QI leverages advanced CMOS
technology
frequency,
efficiency.
Packaged in a 3 mm x 3 mm x 1.1 mm QFN,
the EP53F8QI provides a high degree of
flexibility in circuit design while maintaining a
very small footprint. High switching frequency
allows for the use of very small MLCC input
and output filter capacitors.
The converter uses voltage mode control to
provide high noise immunity, low output
impedance
response. Most compensation components are
integrated into the device, requiring only a
single external compensation capacitor.
Output voltage is programmed via an external
resistor divider.
programmed from 0.6V to V
POK monitors the output voltage and signals if
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while
and
to
provide
excellent
Output voltage can be
ENABLE
also
IN
maintaining
-V
Thermal Limit
Current Limit
high
Soft Start
UVLO
DROPOUT
load
(-)
Generator
(+)
Sawtooth
Figure 4: Functional Block Diagram
Comp
PWM
switching
transient
.
high
Logic
VREF
Compensation
POK
Network
POK
Error
Amp
4/3/2009
(+)
(-)
N-Drive
P-Drive
7
it is within ±10% of nominal. Protection
features include under voltage lockout (UVLO),
over current protection, short circuit protection,
and thermal overload protection.
Stability over Wide Range of Operating
Conditions
The
compensation network and is designed to
provide stable operation over a wide range of
operating conditions.
performance or reduce output voltage ripple
with dynamic loads you have the option to add
supplementary capacitance to the output. The
EP53F8QI is stable with up to 60 µF of output
capacitance without compensation adjustment.
Additional output capacitance above 60 µF can
be
adjustment depending on the application. The
high switching frequency allows for a wide
control loop bandwidth.
DAC
accommodated
EP53F8QI
BIAS
AVIN
PVIN
Package Boundary
utilizes
NC (SW)
VOUT
PGND
VFB
To improve transient
with
www.enpirion.com
an
compensation
EP53F8QI
internal
Rev:A