Electrical characteristics (continued) – Rainbow Electronics MAX5051 User Manual
Page 4
MAX5051
Parallelable, Clamped Two-Switch
Power-Supply Controller IC
4
_______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(AVIN = 12V, PVIN = 12V, V
UVLO
= V
STT
= 3V, V
CON
= 3V, R
RCOSC
= 24k
Ω, C
CSS
= 10nF, C
RCOSC
= 100pF, C
REG9
= 4.7µF,
C
REG5
= 4.7µF, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C. All driver, voltage-regulator, and refer-
ence outputs unconnected except for bypass capacitors.)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SYNCOUT Voltage High
Sourcing 1.2mA
4.5
5.1
V
SYNCOUT Voltage Low
Sinking 2.4mA
0.3
V
RCOSC Peak Trip Level
V
TH
2.5
V
RCOSC Valley Trip Level
0.2
V
RCOSC Input Bias Current
-0.3
µA
RCOSC Discharge MOSFET
R
DS(ON)
Sinking 10mA
50
100
Ω
RCOSC Discharge Pulse Width
50
ns
UNDERVOLTAGE LOCKOUT (UVLO)
UVLO Threshold
V
UVLO
V
UVLO
rising
1.18
1.24
1.30
V
UVLO Hysteresis
V
HYS
130
mV
UVLO Input Bias Current
I
BUVLO
V
UVLO
= 2.5V
-100
+100
nA
PWM COMPARATOR
RCFF Input Voltage Range
0
3
V
Feed-Forward Discharge
MOSFET R
DS(ON)
R
DS(RCFF)
Sinking 10mA
50
100
Ω
CON Input Voltage Range
0
6
V
RCFF Level-Shift Voltage
V
CPWM
2.2
2.4
V
CON Input Bias Current
I
CON
-2
+2
µA
Propagation Delay to Output
t
dCPWM
DRVH, DRVL = unconnected, overdrive =
50mV, measured from CON to DRVL
90
ns
SYNCHRONOUS RECTIFIER PULSE TRANSFORMER DRIVER (LXVDD, LXH, LXL)
High-Side MOSFET R
DS(ON)
R
DSLXH
LXH sourcing 10mA, V
LXVDD
= V
REG5
3
6.5
12
Ω
Low-Side MOSFET R
DS(ON)
R
DSLXL
LXL sinking 10mA, V
LXVDD
= V
REG5
2.0
5
10
Ω
LXH Rising to DRVL Rising Delay
90
ns
CURRENT-LIMIT COMPARATOR (CS)
Current-Limit Threshold Voltage
V
ILIM
144
154
164
mV
Current-Limit Input Bias Current
I
BILIM
0 < V
CS
< 0.3V
-2
+2
µA
Propagation Delay to Output
t
dILIM
DRVH, DRVL = unconnected, overdrive =
10mV, measured from CS to DRVL
100
ns
LOW-SIDE MOSFET DRIVER (DRVDD, DRVL, PGND)
Peak Source Current
V
DRVL
= 0V, pulse width < 100ns;
V
DRVDD
= V
REG9
2
A
Peak Sink Current
V
DRVL
= V
REG9
, pulse width < 100ns;
V
DRVDD
= V
REG9
5
A
DRVL Resistance Sourcing
I
DRVL
= 50mA, V
DRVDD
= V
REG9
1.7
3.5
Ω
DRVL Resistance Sinking
I
DRVL
= -50mA, V
DRVDD
= V
REG9
0.6
1.4
Ω