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PDF IR3883 Data sheet ( Hoja de datos )
| Número de pieza | IR3883 | |
| Descripción | 800kHz 3A EaSy SupIRBuck Synchronous Buck Regulator | |
| Fabricantes | Infineon | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de IR3883 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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IR3883
800kHz 3A EaSy SupIRBuck® Synchronous Buck Regulator
Datasheet
Rev 3.0, 08/20/2016
Power Management & Multimarket
1 page  
IR3883
SupIRBuck® Synchronous Buck Regulator
Pinout Diagram and Pin Description
4 Pinout Diagram and Pin Description
PVin PVin PGND PGND
16 15 14 13
Vin 1
Vcc 2
OCset 3
Exposed
Pad
12 SW
11 SW
10 SW
GND 4
9 BOOT
Figure 4-1
5 6 78
EN/ PG Fb Vo
FCCM
Pinout Diagram: PQFN 3 mm x 3 mm (Top View)
Table 4-1
Pin No.
1
2
3
4
5
6
7
8
9
Pin Description
Name
Pin
Type
Function
Vin S Input supply to the internal LDO.
Vcc S Input bias for the internal control circuitry and driver. Supplied by an internal
LDO or an external Vcc voltage. A 2.2uF ceramic capacitor must be used
between Vcc and the Power ground (PGND).
OCSet
I Over Current Protection (OCP) limit set point. Three user selectable OCP
limits are available by floating this pin, connecting it to Vcc or connecting it to
PGnd.
Gnd S Signal ground for internal reference and control circuitry.
En/FCCM
I Multifunction pin: (1) Enable pin to turn on and off the IC.
(2) Enable Diode Emulation (DE) Mode operation when En/FCCM voltage is
lower than FCCM stop threshold, or Forced Continuous Conduction Mode
(FCCM) operation, when En/FFCM voltage is higher than FCC start threshold.
PGood
O Power Good status output pin is open drain. Connect a pull up resistor of 50kΩ
from this pin to Vcc or an external bias voltage.
Fb I Output voltage feedback pin. Connect this pin to the output of the regulator via
a resistor divider to set the output voltage.
Vo I Vo sense pin. Connect this pin directly to the output of the regulator to set the
on-time.
Boot
I Supply voltage for the high-side driver. Connect this pin to the SW node of the
regulator through a bootstrap capacitor.
Datasheet
5 Rev 3.0 08/20/2016
5 Page 
IR3883
SupIRBuck® Synchronous Buck Regulator
Specifications
2.52
2.5
2.48
2.46
2.44
2.42
2.4
2.38
‐40
‐20
FCCM Start/Stop Threshold
FCCM Start
FCCM Stop
0 20 40 60 80 100 120 140
Temperature (°C)
OVP_Vth
625
620
615
610
605
600
595
590
585
580
575
‐40
‐20
0
20 40 60 80
Temperature (°C)
100 120 140
Iocp
5.50
OCSet = Gnd
5.00
4.50
OCSet = Floating
4.00
3.50
OCSet = Vcc
3.00
2.50
‐40 ‐20 0 20 40 60 80 100 120 140
Temperature (°C)
1000
950
900
850
800
750
700
0
Fsw vs. Iout at room temperature
Vin=12V, Vo=3.3V, L = XAL5030 ‐222, Co = 2x 22uF
0.5 1 1.5 2 2.5
Iout (A)
3
503.00
VFB
502.00
501.00
500.00
499.00
498.00
497.00
‐40 ‐20 0 20 40 60 80 100 120 140
Temperature (°C)
455
450
445
440
435
430
425
420
‐40
‐20
Power Good Threshold
VPG(on)
VPG(lower)
0 20 40 60 80 100 120 140
Temperature (°C)
115
114
113
112
111
110
109
108
107
106
105
‐40
‐20
On‐Time PVin =12V, Vo = 1.05V
0 20 40 60 80 100 120 140
Temperature (°C)
Load Regulation at room temperature
PVin=12V, Vo=3.3V, fsw=800kHz, L=2.2uH, Co=2x22uF
3.45
3.4
3.35
3.3
3.25
3.2
3.15
0
0.5 1 1.5 2
Io (A)
FCCM, Cff=220pF
DEM, Cff = 220pF
2.5
3
Figure 5-2 Typical Operation Characteristics (Set 2 of 3)
Datasheet
11 Rev 3.0 08/20/2016
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet IR3883.PDF ] | |
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