lm5118mhx National Semiconductor Corporation, lm5118mhx Datasheet - Page 5

• Manufacturer Part Number: lm5118mhx
• Description: Wide Voltage Range Buck-boost Controller
• Manufacturer: National Semiconductor Corporation

PWM COMPARATORS
OSCILLATOR (RT PIN)
SYNC
CURRENT LIMIT
RAMP GENERATOR
LOW SIDE (LO) GATE DRIVER
HIGH SIDE (HO) GATE DRIVER
BUCK-BOOST CHARACTERISTICS
THERMAL
Symbol
V
T
t
V
HO(OFF)
ON(MIN)
CS(THX)
V
V
V
V
I
f
f
CS(TH)
I
I
A
I
T
f
OHH
θ
θ
SW1
SW2
I
I
I
OHL
OLH
OLL
OHH
BW
OHL
OLH
R1
R2
R3
OLL
SD
OL
JA
JC
Parameter
COMP Sink/Source Current
DC Gain
Unity Bain Bandwidth
Forced HO Off-time
Minimum HO On-time
COMP to Comparator Offset
Frequency 1
Frequency 2
Sync threshold falling
Cycle-by-cycle Sense Voltage
Threshold (CS-CSG)
Cycle-by-cycle Sense Voltage
Threshold (CS-CSG)
CS Bias Current
CSG Bias Current
Current Limit Fault Timer
RAMP Current 1
RAMP Current 2
RAMP Current 3
VOUT Bias Current
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-HS Under Voltage Lock-out
Buck-Boost Mode
Thermal Shutdown Temp.
Thermal Shutdown Hysterisis
Junction to Ambient
Junction to Case
Conditions
RT = 29.11 kΩ
RT = 9.525 kΩ
RAMP = 0 Buck Mode
RAMP = 0 Buck-Boost Mode
CS = 0V
CSG = 0V
VIN = 60V, VOUT = 10V
VIN = 12V, VOUT = 12V
VIN = 5V, VOUT = 12V
VOUT = 48V
I
I
V
C-load = 1 nF, VCC = 8V
C-load = 1 nF, VCC = 8V
V
V
I
I
V
C-load = 1 nF, VCC = 8V
C-load = 1 nF, VCC = 8V
V
V
Buck Duty Cycle (Note 5)
LO
LO
HO
HO
OHL
LO
LO
OHH
HO
HO
5
= 100 mA
= -100 mA
= 100 mA
= -100 mA,
= 0V, VCC = 8V
= VCC = 8V
= 0V, VCC = 8V
= VCC = 8V
= V
= V
CC
HB
-V
-V
LO
OH
0.095
-103
-218
Min
305
178
450
245
0.1
95
65
69
3
0.135
-125
-255
0.14
0.25
0.25
Typ
400
200
200
515
256
305
115
245
165
1.3
2.2
2.7
2.2
3.5
80
70
45
45
80
16
14
14
12
75
25
40
3
3
4
-147
-300
Max
0.23
0.21
495
224
575
365
135
60
60
95
80
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cycles
Units
°C/W
°C/W
MHz
kHz
kHz
mA
mV
mV
mV
dB
µA
µA
µA
µA
µA
µA
ns
ns
ns
ns
ns
ns
°C
°C
%
V
V
V
A
A
V
V
V
V
V