IR3895 Просмотр технического описания (PDF) - International Rectifier
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производитель
IR3895
International Rectifier
IR3895 Datasheet PDF : 45 Pages
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16A Highly Integrated SupIRBuck
Single‐Input V-o8lt-aPge, Synchronous Buck Regulator
PD‐97746
IR3895
PARAMETER
Accuracy
Vref Margining Voltage
SYMBOL
Vref_marg
CONDITIONS
0°C < Tj < 70°C
‐40°C < Tj < 125°C, Note 3
Sink Current
Source Current
Vref Comparator Threshold
Soft Start/Stop
Soft Start Ramp Rate
Soft Start Ramp Rate
S_Ctrl Threshold
Power Good
PGood Turn on Threshold
PGood Lower Turn off Threshold
PGood Turn on Delay
PGood Upper Turn off Threshold
PGood Comparator Delay
PGood Voltage Low
Tracker Comparator Upper
Threshold
Tracker Comparator Lower
Threshold
Tracker Comparator Delay
Under‐Voltage Lockout
Vcc‐Start Threshold
Vcc‐Stop Threshold
Isink_Vref
Isrc_Vref
Vref_disable
Vref_enable
Vref = 0.6V
Vref = 0.4V
Vref pin connected externally
Ramp
(SS_start)
Ramp
(SS_stop)
High
Low
VPG(on) Vsns Rising, 0.4V < Vref < 1.2V
Vsns Rising, Vref < 0.1V
VPG(lower) Vsns Falling, 0.4V < Vref < 1.2V
Vsns Falling, Vref < 0.1V
VPG(on)_Dly Vsns Rising, see VPG(on)
VPG(upper) Vsns Rising, 0.4V < Vref < 1.2V
Vsns Rising, Vref < 0.1V
VPG(comp)_ Vsns < VPG(lower) or
Dly
Vsns > VPG(upper)
PG(voltage) IPgood = ‐5mA
VPG(tracker Vp Rising, Vref < 0.1V
_upper)
VPG(tracker Vp Falling, Vref < 0.1V
_lower)
Tdelay(track Vp Rising, Vref < 0.1V,see
er)
VPG(tracker_upper)
VCC_UVLO_
Start
VCC_UVLO_
Stop
Vcc Rising Trip Level
Vcc Falling Trip Level
Enable‐Start‐Threshold
Enable_UVL Supply ramping up
O_Start
MIN TYP
‐0.5
‐1.0
0.4
MAX
+0.5
+1.0
1.2
UNIT
%
V
12.7 16.0 19.3
µA
12.7 16.0 19.3
0.15
V
0.4
0.16 0.2
‐0.24 ‐0.2
0.24
‐0.16
mV/µs
2.4
V
0.6
85
90
95 % Vref
85
90
95
% Vp
80
85
90 % Vref
80
85
90
% Vp
1.28
ms
115 120 125 % Vref
115 120 125 % Vp
1
2
3.5
µs
0.5
V
0.4
V
0.3
1.28
ms
4.0 4.2
4.4
3.7 3.9
4.1
V
1.14 1.2 1.26
V
8 JANUARY 18, 2013 | DATA SHEET| Rev 3.4
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