IR3883MTRPBF Datasheet, PDF (8/43 Pages) Infineon Technologies AG – 800kHz 3A EaSy SupIRBuck® Synchronous Buck Regulator

IR3883
SupIRBuck^® Synchronous Buck Regulator
Specifications
5.2
Recommended Operating Conditions
Table 5-3 Recommended Operating Conditions
Symbol
Parameter
Min
PVin
Input Voltage Range with External Vcc
2.5
PVin, Vin Input Voltage Range with Internal LDO
5.5
Vcc
Supply Voltage Range
4.5
V_o
Output Voltage Range
0.5
I_o
Continuous Output Current Range
0
T_J
Operating Junction Temperature
-40
Max
14
14
5.5
5
3
125
Units
V
V
V
V
A
o_C
Condition
5. 3.
6. 3.
3.
Note:
5. Vin is connected to Vcc to bypass the internal LDO.
6. Vin is connected to PVin. For single-rail applications with PVin=Vin=4.5V-5.5V, Vcc (the internal LDO output
voltage) is in dropout mode. Please refer to the application information in the internal LDO and the Over
Current Protection sections.
5.3
Electrical Characteristics
Unless otherwise specified, these specifications apply over, 5.5V < Vin = PVin < 14V, 0°C < T_J < 125°C.
Typical values are specified at Ta = 25°C.
Table 5-4 Electrical Characteristics
Symbol
Parameter
Test Conditions
Power Stage
R_{ds(on)_Top}
Top Switch
V_Boot - Vsw= 5.2V, Tj =25°C
R_{ds(on)_Bot}
Bottom Switch
Vcc = 5.2V, Tj =25°C
Boot Diode Forward Voltage I_Boot = 10mA
Supply Current
I_in(Standby)
I_in(Static)
I_in(Dyn)
Vin Supply Current (standby) En = Low
Vin Supply Current (static) En = 2V, No Switching
Vin Supply Current
(dynamic)
En = High, Fs = 800kHz,
Vin = 12V
Soft-Start
SS_rate
Soft-Start Ramp Rate
Feedback Voltage
V_FB
Feedback Voltage
Accuracy
0°C <Tj < 85°C, Vout =0.5V
-40°C <Tj < 125°C, Vout =0.5V^7.
I_VFB
V_FB Input Current
On-Time Timer Control
V_FB = 0.5V, Tj = 25°C
T_on
T_on(Min)
On-Time
Minimum On-Time
V_in = 12V, V_o = 1.05V
V_in = 12V, V_o = 0V ^8.
Min
-
-
-
-
-
0.16
-
-0.6
-1
-0.4
Typ Max Units
82 106.4 mΩ
26 33.9 mΩ
200 300 mV
1.8 10 μA
137 200 μA
4.5 5.5 mA
0.2 0.24 mV/µs
0.5
V
+0.6 %
+1
%
0 +0.4 μA
109
ns
20
50
ns
Datasheet
8
Rev 3.0 08/20/2016