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IXD3220 Datasheet(PDF) 3 Page - Zilog, Inc.

Part # IXD3220
Description  16V Input Voltage Step-Down DC/DC Controller
PDF  18 Pages
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Manufacturer  ZILOG [Zilog, Inc.]
Direct Link  http://www.zilog.com
Logo ZILOG - Zilog, Inc.

IXD3220 Datasheet(HTML) 3 Page - Zilog, Inc.

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Product Specification
IXD3220/IXD3221
PS034101-0515
PRELIMINARY
3
ELECTRICAL OPERATING CHARACTERISTICS (Continued)
IXD3220/221 B and D versions
Unless otherwise specified, VIN = 5 V, Ta = 25
0C
PARAMETER
SYMBOL
CONDITIONS
MIN.
TYP.
MAX.
UNIT
CIRCUIT
FB Voltage
VFB
0.8865
0.9000
0.9135
V
Input Voltage Range
VIN
2.8
-
16.0
V
UVLO Voltage
(Minimum Operating Voltage)
VUVLO
1.9
2.3
2.7
V
Supply Current 2
IDD2
VIN = 5.0 V, VFB = 1.0 V
**
µA
Standby Current
ISTB
0.1
1
µA
Oscillation Frequency
fOSC
Connected to external components
**
kHz
Maximum Duty Cycle Ratio
DMAX
100
-
-
%
PFM Duty Cycle Ratio
DPFM
No load IXD3221 series only
15
25
35
%
EXT “H” ON Resistance
REXTH
6
10
16
Ω
EXT “L” ON Resistance
REXTL
6
12
20
Ω
Integral Protection Time (*4)
tPRO
IXD3220/221 B series
**
ms
Short-Circuit Protection
VSHRT
0 . 7
V
Soft-Start Time
tSS
Connected to RSS and CSS
5.0
10.0
2 0 . 0
ms
Internal Soft-Start Time (*1)
tSS_INT
**
ms
Efficiency (*2)
EFF1
92
%
FB Voltage Temperature
Characteristics
±100
ppm/
0C
CE “High” Voltage (*3)
VCEH
2.6
V
CE “Low” Voltage
VCEL
0.3
V
CE
“High” Current
ICEH
VIN = VCE = 16 V
-0.1
0.1
µA
CE “Low” Current
ICEL
VIN = 16 V, VCE = 0 V
-0.1
0.1
µA
FB “High” Current
IFBH
VIN = VCE = 16 V
-0.1
0.1
µA
FB “Low” Current
IFBL
VIN = 16 V, VCE = 0 V
-0.1
0.1
µA
NOTE:
External Components: CSS = 0.1 µF, RSS = 200 kΩ
*1 - In case where the UVLO function operates temporarily due to the power cutoff etc., when an external CSS is charged (VCE > 2.6 V), the IC
restarts operation by the internal soft-start time. Minimum value of soft-start time set externally is equal to the internal soft-start time.
*2: EFFI = {(output voltage) x (output current)} / {(input voltage) x (input current)} x 100
*3: The integral latch and short-circuit protection do not function when the CE/CSS pin voltage is lower than 2.6 V during the soft-start time.
*4: No Integral protection function is available with the IXD3220/221 D series.
** Refer to the CHARACTERISTICS CHART BY OSCILLATION FREQUENCY.
CHARACTERISTICS CHART BY OSCILLATION FREQUECY
PARAMETER
SYMBOL
300kHz
500kHz
1.0MHz
UNITS
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
MIN.
TYP.
MAX.
Supply Current 2
IDD2
-
25
50
-
25
50
-
40
80
µA
Oscillation Frequency
fOSC
255
300
345
425
500
575
850
1000
1150
kHz
Integral Protection Time
tPRO
0.5
1.0
2.0
0.5
1.0
2.0
0.25
0.50
1.00
ms
Soft-Start Time
tSS
2
3
8
2
4
8
1
2
4
ms



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