16A Highly Integrated SupIRBuck
Single‐Input V-o7lt-aPge, Synchronous Buck Regulator
PD‐97746
IR3895
PARAMETER
Zero‐crossing Comparator Delay
Zero‐crossing Comparator Offset
Oscillator
Rt Voltage
Frequency Range
Ramp Amplitude
Ramp Offset
Min Pulse Width
Max Duty Cycle
Fixed Off Time
Sync Frequency Range
Sync Pulse Duration
Sync Level Threshold
Error Amplifier
Input Offset Voltage
Input Bias Current
Input Bias Current
Sink Current
Source Current
Slew Rate
Gain‐Bandwidth Product
DC Gain
Maximum output Voltage
Minimum output Voltage
Common Mode input Voltage
Reference Voltage
Feedback Voltage
SYMBOL
Tdly_zc
Vos_zc
CONDITIONS
Note 4
Note 4
Vrt
Fs
Vramp
Ramp(os)
Tmin(ctrl)
Dmax
Toff
Fsync
Tsync
High
Low
Rt = 80.6K
Rt = 39.2K
Rt = 15.0K
Vin = 6.8V, Vin slew rate max = 1V/µs,
Note 4
Vin = 12V, Vin slew rate max = 1V/µs,
Note 4
Vin = 21V, Vin slew rate max = 1V/µs,
Note 4
Vcc=Vin=5V,For external Vcc operation,
Note 4
Note 4
Note 4
Fs = 300kHz, PVin = Vin = 12V
Note 4
Vos_Vref
Vos_Vp
IFb(E/A)
IVp(E/A)
Isink(E/A)
Isource(E/A)
SR
GBWP
Gain
Vmax(E/A)
Vmin(E/A)
VFb – Vref, Vref = 0.5V
VFb – Vp, Vp = 0.5V,Vref=0
Note 4
Note 4
Note 4
Vfb
Vref and Vp pin floating
MIN TYP
256/Fs
‐4
0
270
540
1350
1.0
300
600
1500
1.02
1.80
3.15
0.75
0.16
86
200
270
100 200
3
‐1.5
‐1.5
‐1
0
0.4 0.85
4
7.5
7
12
20
30
100 110
1.7 2.0
0
0.5
MAX
4
330
660
1650
60
250
1650
0.6
+1.5
+1.5
+1
+4
1.2
11
20
40
120
2.3
100
1.2
UNIT
s
mV
V
kHz
Vp‐p
V
ns
%
ns
kHz
ns
V
%
µA
mA
mA
V/µs
MHz
dB
V
mV
V
V
7 JANUARY 18, 2013 | DATA SHEET| Rev 3.4