lm5119psqx National Semiconductor Corporation, lm5119psqx Datasheet - Page 6

• Manufacturer Part Number: lm5119psqx
• Description: Lm5119 Wide Input Range Dual Synchronous Buck Controller
• Manufacturer: National Semiconductor Corporation

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Symbol
Error Amplifier
PWM Comparators
Oscillator
Current Limit
RES
Diode Emulation
LO Gate Driver
HO Gate Driver
t
t
V
HO(OFF)
ON(min)
V
V
V
V
V
V
f
f
CS(TH)
I
I
I
I
A
I
f
V
SW1
SW2
V
OHH
RES
OHL
OLL
OLH
OHH
BW
RES
OHL
OLH
REF
OLL
OL
IH
IL
Parameter
FB Reference Voltage
FB Input Bias Current
FB Disable Threshold
COMP VOH
COMP VOL
DC Gain
Unity Gain Bandwidth
Forced HO Off-time
Minimum HO On-time
Frequency 1
Frequency 2
RT Output Voltage
RT Sync Positive Threshold
Sync Pulse Minimum Width
Cycle-by-cycle Sense Voltage
Threshold (CS - CSG)
CS Bias Current
Hiccup Mode Fault Timer
RES current Source
RES threshold
DEMB Input Low Threshold
DEMB Input High Threshold
DEMB Input Pull-Down Resistance
SW Zero Cross Threshold
LO Low-state Output Voltage
LO High-state Output Voltage
LO Rise Time
LO Fall Time
Peak LO Source Current
Peak LO Sink Current
HO Low-state Output Voltage
HO High-state Output Voltage
HO Rise Time
HO Fall Time
Peak HO Source Current
Peak HO Sink Current
HB to SW Under-voltage
HB DC Bias Current
Conditions
Measured at FB pin, FB = COMP
FB = 0.8V
Interleaved Threshold
Isource = 3mA
Isink = 3mA
C
R
R
RAMP = 0
CS = 0V
C
I
I
V
C-load = 1000pF
C-load = 1000pF
V
V
I
I
V
C-load = 1000pF
C-load = 1000pF
V
V
HB - SW = 8V
LO
LO
HO
HO
OHL
LO
LO
OHH
HO
HO
RAMP
T
T
RES
= 25kΩ
= 10kΩ
= 100mA
= -100mA,
= 100mA
= -100mA,
= 0V
= VCC
= 0V, SW = 0, HB = 8V
= V
= VCC - V
Charging
= V
= 50pF
HB
HB
= 8V
- V
HO
LO
6
0.788
1.20
Min
220
180
430
100
106
2.8
2.5
2.9
1.25
1.25
0.17
0.11
0.18
Typ
320
100
200
480
120
256
0.8
2.5
3.2
-70
9.7
2.0
2.6
0.1
2.5
3.3
2.2
3.3
80
50
70
-5
1
3
6
5
6
5
3
0.812
Max
0.31
1.30
1.65
0.18
0.26
0.19
0.27
430
220
530
134
100
-95
4
Cycles
Units
MHz
kHz
kHz
mV
mV
nA
dB
µA
µA
kΩ
µA
ns
ns
ns
ns
ns
ns
ns
V
V
V
V
V
V
V
V
V
V
V
A
A
V
V
A
A
V