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参数资料
| 型号： | APW7093QAI-TRL |
| 厂商： | Anpec Electronics Corporation |
| 英文描述： | 3A, 1MHz, Step Down DC/DC Regulator |
| 中文描述： | 第3A，1MHz的，下步直流/直流稳压器 |
| 文件页数： | 5/20页 |
| 文件大小： | 728K |
| 代理商： | APW7093QAI-TRL |
Copyright
ANPEC Electronics Corp.
Rev. A.5 - Jun., 2005
APW 7093
www.anpec.com.tw
5
Functional Pin Description
Name
PIN (QFN)
PIN (QSOP)
FUNCTION
N.C
1,5,7,9,11,13,16,19,
25,26,28,30,32
X
No Connection, Not internally connected.
IN
2,4
2,4
Supply Voltage Input for the internal PMOS Power Switch.
Not internally connected. Externally connect all pins for
proper operation.
Inductor Connection. Connection for the drains of the PMOS
power switch and NMOS synchronous-rectifier switch.
Connect the inductor from this node to the output filter
capacitor and load. Not internally connected. Externally
connect all pins for proper operation.
Soft-Start Connect a capacitor from SS to GND to limit inrush
current during startup.
External Reference Input Feedback input regulates to
V
EXTREF
. The PWM controller remains off until EXTREF is
greater than REF.
Off-Time Select Input. Sets the PMOS power switch
constant-off-time. Connect a resistor from TOFF to GND to
adjust the PMOS switch off-time.
Feedback Input. Connect directly to output for fixed-voltage
operation or to a resistive-divider for adjustable operating
modes.
Analog Ground. Connect exposed backside pad and corner
tabs to analog GND.
Reference Output. Bypass REF to GND with a 0.1
μ
F
capacitor.
Tie to GND (pin 13 QFN; pin 9 SSOP)
Analog Supply Voltage Input. Supplies internal analog
circuitry. Bypass V
CC
with a 10
and 1
μ
F low-pass filter. See
Figure2.
Power Ground. Internally connected to the internal NMOS
synchronous-rectifier switch.
Shutdown control Input Drive SHDN low to disable the
reference, control circuitry, and internal MOSFETs. Drive
high or connect to V
CC
for normal operation.
LX
3,21,22,27,29
3,14,16
SS
6
5
EXTREF
8
6
T
OFF
10
7
FB
12
8
GND
14,17,backside pad,
corner tabs
9
REF
15
10
GND
17
11
V
CC
18
12
PGND
20,23,24
13,15
SHDN
31
1
Note2: The output voltage will have a DC-regulation level lower than the feedback error comparator threshold
by 50% of the ripple.
Note3: Recommended operating frequency, not production tested.
Electrical Characteristics ( Cont.)
(V
IN
=V
CC
=3.3V, V
EXTREF
=+1.1V, T
A
= -45 to +85
o
C, unless otherwise noted, Typical values are at T
A
=+25
o
C.)
APW7093
Min Typ Max
2.0
Symbol
Parameter
Test Conditions
Unit
V
IL
V
IH
0.8
3.1 A
RMS
SHDN Logic Levels
V
I
OUT(RMS)
Maximum Output RMS Current
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