IR3897 IRF [International Rectifier], IR3897 Datasheet - Page 8
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IR3897
Manufacturer Part Number
IR3897
Description
4A HIGHLY INTEGRATED SUPLRBUCK
Manufacturer
IRF [International Rectifier]
Datasheet
1.IR3897.pdf
(45 pages)
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Quantity
Price
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Manufacturer:
IR
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Part Number:
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Manufacturer:
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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 Stop 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 Dely
PARAMETER
8
AUGUST 08, 2012 |DATA SHEET | Rev 3.3
Single‐Input Voltage, Synchronous Buck Regulator
Ramp(SS_start)
Enable_UVLO_Start
OVP_Tdly
Ramp(SS_stop)
Tdelay(tracker) Vp Rising, Vref < 0.1V,see
Enable_UVLO_Stop
VPG(tracker_
VPG(tracker_
VPG(on)_Dly
Vref_disable
Vref_enable
VPG(comp)_
V
V
VPG(upper)
PG(voltage)
VPG(lower)
Vref_marg
CC
Isink_Vref
CC
Isrc_Vref
OVP_Vth
SYMBOL
VPG(on)
_UVLO_Start
_UVLO_Stop
upper)
lower)
High
Low
Dly
Ien
- 8 -
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
4A Highly Integrated SupIRBuck
= ‐5mA
CONDITIONS
‐0.24
MIN
12.7
12.7
0.16
1.14
0.95
115
115
115
115
0.4
0.4
2.4
85
4.0
3.7
85
85
80
1
1
TM
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
IR3897
MAX
‐0.16
19.3
19.3
0.15
0.24
1.26
1.05
125
125
125
125
1.2
0.6
95
3.5
0.5
4.4
4.1
3.5
95
95
90
1
PD‐97663
mV/µs
% Vref
% Vref
% Vref
% Vref
UNIT
% Vp
% Vp
% Vp
% Vp
ms
ms
µA
µA
µs
µs
V
V
V
V
V
V
V