XC9221C095MR Torex Semiconductor Ltd, XC9221C095MR Datasheet - Page 7

• 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

> Circuit Example1 : N-ch Open Drain
■OPERATIONAL EXPLANATION (Continued)
VCE
<U.V.L.O. (Under Voltage Lock Out) >
<Soft-Start Time>
ON/OFF
Signal
When the input voltage becomes 2.3V (TYP.) or lower, the external P-channel driver transistor is forced OFF. Once
the U.V.L.O. operates, the XC9220/9221A and C series (soft-start internally set type) resets the internal circuit. For
this, by releasing the U.V.L.O. function, the IC performs the soft-start function to initiate output startup operation.
When the input voltage falls because of a power cutoff etc. and the IC stops operation due to the U.V.L.O. function, the
IC resumes its operation by internal soft-start circuit of the XC9220/XC9221B and D series. If the soft-start time is
needed to set externally, the CE/C
●U.V.L.O. Operation
The XC9220/XC9221B and D series can adjust the soft-start time externally via the CE pin. The soft-start function
operates until the CE pin voltage becomes 2.6V. Please refer to the following equation for calculating the soft-start
time. Minimum soft-start time is equal to the time set internally.
T
(XC9220/21A and C series)
(XC9220/21B and D series)
SS
U.V.L.O. ( Internal Signal)
= - C
Rss
SS
x R
VOUT
VOUT
Rss
VIN
SS
Css
x In { (V
Css
VCE
CE/CSS
CE
CE/CSS PIN
PIN
– 2.2) / V
> Circuit Examle2 : CMOS logic (low current dissipation)
release delay
U.V .L.O.
SS
ON/OFF
Signal
CE
pin voltage should be reset to 0V. (Please see the soft-start circuit example.)
}
Sof t-start time: Tss1
XC9220/21A series
XC9220/21B series
VCE
Rss
Css
CE/CSS
Sof t-start time (Externally set-up) :Tss2
PIN
> Cicuit Examle3 : CMOS logic (low current dissipation, quick off)
Minimum soft-start time
(XC9220/21A series)
(XC9220/21A series)
soft-start time: Tss2
when externally set:
sotf-start time:Tss1
ON/OFF
Tss2_min = Tss1
Signal
Externally set
Internal
U.V .L.O. operation
VCE
release delay
U.V .L.O.
Sof t-start time:Tss1
Rss
XC9220/9221
Css
CE/CSS
PIN
Series
7/21