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參數(shù)資料
| 型號(hào)： | EP53F8QI |
| 廠商： | ENPIRION INC |
| 元件分類： | 穩(wěn)壓器 |
| 中文描述： | 1.5 A SWITCHING REGULATOR, 4000 kHz SWITCHING FREQ-MAX, QCC16 |
| 封裝： | 3 X 3 MM, 1.10 MM HEIGHT, HAOLOGEN FREE AND ROHS COMPLIANT, QFN-16 |
| 文件頁(yè)數(shù)： | 9/11頁(yè) |
| 文件大小： | 259K |
| 代理商： | EP53F8QI |
01542
4/3/2009
Rev:A
EP53F8QI
Enpirion 2009 all rights reserved, E&OE
7
www.enpirion.com
Functional Block Diagram
DAC
VREF
(+)
(-)
Error
Amp
VFB
VOUT
Package Boundary
P-Drive
N-Drive
UVLO
Thermal Limit
Current Limit
Soft Start
Sawtooth
Generator
(+)
(-)
PWM
Comp
PVIN
ENABLE
PGND
Logic
Compensation
Network
NC (SW)
POK
AVIN
BIAS
Figure 4: Functional Block Diagram
Functional Description
The EP53F8QI leverages advanced CMOS
technology
to
provide
high
switching
frequency,
while
also
maintaining
high
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
and
excellent
load
transient
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.
Output voltage can be
programmed from 0.6V to VIN-VDROPOUT.
POK monitors the output voltage and signals if
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
EP53F8QI
utilizes
an
internal
compensation network and is designed to
provide stable operation over a wide range of
operating conditions.
To improve transient
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 F of output
capacitance without compensation adjustment.
Additional output capacitance above 60 F can
be
accommodated
with
compensation
adjustment depending on the application. The
high switching frequency allows for a wide
control loop bandwidth.
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