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XRP6141EVB 数据表(PDF) 3 Page - Exar Corporation

部件名 XRP6141EVB
功能描述  35A Synchronous Step Down COT Controller
PDF  14 Pages
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制造商  EXAR [Exar Corporation]
网页  http://www.exar.com
标志 EXAR - Exar Corporation

XRP6141EVB 数据表(HTML) 3 Page - Exar Corporation

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XRP6141
35A Synchronous Step Down COT Controller
© 2015 Exar Corporation
3/14
Rev. 2.0.0
Parameter
Min.
Typ.
Max. Units
Conditions
Programmable Constant On-Time
On-Time 1
1855
2182
2509
ns
• RON = 141.2kΩ, VIN=22V
f corresponding to On-Time 1
217
250
294
kHz
VIN=22V, VOUT=12V
Minimum Programmable
On-Time
109
ns
RON = 7.059kΩ, VIN=22V
On-Time 2
170
200
230
ns
• RON = 7.059kΩ, VIN=12V
f corresponding to On-Time 2
1618
1375
1196
kHz
VOUT=3.3V
f corresponding to On-Time 2
490
417
362
kHz
VOUT=1.0V
On-Time 3
391
460
529
ns
• RON = 16.235kΩ, VIN=12V
Minimum Off-Time
250
350
ns
•
Diode Emulation Mode
Zero crossing threshold
-4
-1
mV
DC value measured during test
SoftStart
SS Charge current
-14
-10
-6
µA
•
SS Discharge current
1
mA
• Fault present
VCC Linear Regulator (VCC should be tied to VIN, for 4.5V≤VIN≤5.5V)
VCC Output Voltage
4.8
5.0
5.2
V
• VIN=6V to 22V, Iload=0 to 30mA
4.51
4.7
• VIN=5V, Iload=0 to 20mA
Dropout Voltage
200
300
490
mV
• IVCC=30mA
Power Good Output
Power Good Threshold
-10
-7.5
-5
%
Power Good Hysteresis
2
4
%
Power Good Sink Current
1
mA
Protection: OCP, OTP, Short-circuit
Hiccup timeout
110
ms
ILIM pin source current
45
50
55
µA
ILIM current temperature coeff.
0.4
%/°C
OCP comparator offset
-8
0
+8
mV
•
Current limit blanking
100
ns
GL rising>1V
Thermal shutdown threshold1
150
°C
Rising temperature
Thermal Hysteresis1
15
°C
VSCTH Feedback pin short-circuit
threshold
50
60
70
%
• Percent of VREF, short circuit is active
After PGOOD is up
Output Gate drivers
GH Pull-Down Resistance
1.35
2.0
Ω
IGH=200mA
GH Pull-up Resistance
1.8
2.8
Ω
IGH=200mA
GL Pull-Down Resistance
1.35
1.9
Ω
IGL=200mA
GL Pull-up Resistance
1.7
2.7
Ω
IGL=200mA
GH and GL pull-down Resistance
50
---
kΩ
GH and GL rise time
35
50
ns
10% to 90%
GH and GL fall time
30
40
ns
90% to 10%
GL to GH non-overlap time
20
30
60
ns
Measured GL falling edge =1V to
GH rising edge =1V, BST=VCC, SW=0V
GH to GL non-overlap time
15
20
40
ns
Measured GH falling edge =1V to
GL rising edge =1V
Note 1: Guaranteed by design



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