XC9221C095MR Torex Semiconductor Ltd, XC9221C095MR Datasheet - Page 9

• Manufacturer Part Number: XC9221C095MR
• Description: DC/DC STEP DOWN, ADJ 16V, 500KHZ
• Manufacturer: Torex Semiconductor Ltd

Specifications of XC9221C095MR

• Primary Input Voltage: 16V
• No. Of Outputs: 1
• Output Voltage: 12V
• Output Current: 3A
• Voltage Regulator Case Style: SOT-25
• No. Of Pins: 5
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

■OPERATIONAL EXPLANATION (Continued)
● Output Voltage Setting
● Recommended MOSFET and SBD (Examples)
● Ceramic Capacitor
Output voltage can be set by adding split resistors. Output voltage is determined by the following equation, based on
the values of R
V
The value of C
should usually be 5kHz. Adjustments are required from 1kHz to 20kHz depending on the application, value of
inductance (L), and value of load capacity (C
C
[Sample calculation: Setting 3.3V V
R
C
OUT
FB
FB1
FB
[Typical examples]
With the XC9220/9221 series, a ceramic capacitor can be used as an output capacitor (C
is required for using the ceramic capacitor. The value of RSENSE resistor is determined depending on the
setting output voltage as the chart below.
*1: Recommended to use P-ch MOSFET with Ciss less than 1500pF.
*2: SBD should be used with high-toned reverse characteristics.
= 1 / (2 x
= 1 / (2 x
Schottky Barrier Diode
OUTPUT VOLTAGE
V
= 200k
= 0.9 x (R
1.2
1.5
1.8
(V)
P-ch MOSFET (*1)
OUT
V
V
(SBD) (*2)
OUT
OUT
Ω
I
π
π
≦2.5V
OUT
>2.5V
, R
FB
FB1
FB1
x R
x 200k x 5k) =150pF
R
(kΩ)
100
180
220
, speed-up capacitor for phase compensation, should be adjusted by the following equation. Fzfb
FB2
FB1
and R
FB1
+ R
=75k
FB2
x fzfb)
FB2
Ω
) / R
R
(kΩ)
300
270
220
, V
. The sum of R
FB2
FB2
OUT
XB01SB04A2BR
UP TO 500mA
RSENSE (mΩ)
(TOREX)
= 0.9 x (200k + 75k) / 75k = 3.300V
OUT
(pF)
C
330
180
150
100
50
]
FB
FB1
L
CPH3308
(SANYO)
).
V
and R
12.0
3.3
5.0
(V)
OUT
FB2
UP TO 1A
D1FH3 (SHINDENGEN)
should normally be 1MΩ or less.
R
(kΩ)
200
150
160
CMS02 (TOSHIBA)
FB1
＜External Components＞
P-ch MOSFET: 2SJ646 (SANYO)
SBD: DE5PC3 (SHINDENGEN)
L: CDRH8D28-4R7 (4.7uH, SUMIDA / Fosc=1.0MHz)
C
C
RSENSE: 100mΩ (V
IN
L
CDRH8D43-100 (10uH, SUMIDA / Fosc=500kHz)
CDRH127-220 (22uH, SUMIDA / Fosc=300kHz)
: 22uF (ceramic / Fosc=1.0MHz, 500kHz)
: 22uF (ceramic)
47uF (ceramic / Fosc=300kHz)
R
(kΩ)
75
33
13
FB2
UP TO 2A
(SANYO)
50mΩ (V
2SJ616
(pF)
C
150
220
180
FB
OUT
OUT
＞2.5V)
≦2.5V)
(SHINDENGEN)
L
). RSENSE resistor
UP TO 3A
(SANYO)
DE5PC3
2SJ646
XC9220/9221
Series
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