IR3894 IRF [International Rectifier], IR3894 Datasheet - Page 8

• Manufacturer Part Number: IR3894
• Description: 12A HIGHLY INTERGRATED SUPLRBUCK
• Manufacturer: IRF [International Rectifier]

Soft Start/Stop
Power Good
Under‐Voltage Lockout
Over‐Voltage Protection
Vref Margining Voltage
Sink Current
Source Current
Vref Comparator Threshold
Soft Start Ramp Rate
Soft Start Ramp Rate
S_Ctrl Threshold
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
Vcc‐Start Threshold
Vcc‐Stop Threshold
Enable‐Start‐Threshold
Enable‐Stop‐Threshold
Enable Leakage Current
OVP Trip Threshold
OVP Comparator Delay
PARAMETER
8
AUGUST 08, 2012 | DATA SHEET | Rev 3.1
Ramp(SS_start)
Ramp(SS_stop)
Tdelay(tracker) Vp Rising, Vref < 0.1V,see
Enable_UVLO_
Enable_UVLO_
Single‐Input Voltage, Synchronous Buck Regulator
VPG(tracker_
VPG(tracker_
VPG(on)_Dly
Vref_disable
VPG(comp)_
Vref_enable
VPG(upper)
PG(voltage)
VPG(lower)
V
V
Vref_marg
Isink_Vref
OVP_Tdly
OVP_Vth
SYMBOL
Isrc_Vref
CC
CC
VPG(on)
upper)
lower)
_UVLO_
_UVLO_
High
Low
Dly
Ien
‐40°C < Tj < 125°C, Note 3
Vref = 0.6V
Vref = 0.4V
Vref pin connected externally
Vsns Rising, 0.4V < Vref < 1.2V
Vsns Rising, Vref < 0.1V
Vsns Falling, 0.4V < Vref < 1.2V
Vsns Falling, Vref < 0.1V
Vsns Rising,see VPG(on)
Vsns Rising, 0.4V < Vref < 1.2V
Vsns Rising, Vref < 0.1V
Vsns < VPG(lower) or
Vsns > VPG(upper)
IPgood
Vp Rising, Vref < 0.1V
Vp Falling, Vref < 0.1V
VPG(tracker_upper)
Vcc Rising Trip Level
Vcc Falling Trip Level
Supply ramping up
Supply ramping down
Enable = 3.3V
Vsns Rising, 0.45V < Vref < 1.2V
Vsns Rising, Vref < 0.1V
- 8 -`
12A Highly Integrated SupIRBuck
= ‐5mA
CONDITIONS
‐0.24
MIN
12.7
12.7
0.16
1.14
0.95
‐1.0
115
115
115
115
0.4
0.4
2.4
80
4.0
3.7
85
85
80
1
1
16.0
16.0
1.28
1.28
TYP
‐0.2
120
120
120
120
0.2
4.2
1.2
0.4
0.3
3.9
90
90
85
85
2
1
2
IR3894
MAX
‐0.16
+1.0
19.3
19.3
0.15
0.24
125
1.26
1.05
125
125
125
1.2
0.6
3.5
0.5
4.4
4.1
3.5
95
95
90
90
1
PD‐97745
mV/µs
% Vref
% Vref
% Vref
% Vref
UNIT
% Vp
% Vp
% Vp
% Vp
ms
ms
µA
µA
µs
µs
V
V
V
V
V
V
V