max5074aup Maxim Integrated Products, Inc., max5074aup Datasheet - Page 4

• Manufacturer Part Number: max5074aup
• Description: Power Ic With Integrated Mosfets For Isolated Ieee 802.3af Pd And Telecom Power-supply Applications
• Manufacturer: Maxim Integrated Products, Inc.

Power IC with Integrated MOSFETs for Isolated IEEE
802.3af PD and Telecom Power-Supply Applications
ELECTRICAL CHARACTERISTICS (continued)
(V
T
Note 1: All limits at -40°C are guaranteed by design and not production tested.
Note 2: Output switching frequency is half of oscillator frequency.
(V
V
4
Propagation Delay to XFRMRL
BOOST VOLTAGE CIRCUIT (See Figure 1, QB)
Driver Output Delay
One-Shot Pulse Width
QB R
THERMAL SHUTDOWN
Shutdown Temperature
Thermal Hysteresis
UNDERVOLTAGE LOCKOUT (UVLO)
UVLO Threshold
UVLO Hysteresis
UVLO Input Bias Current
SUPPLY CURRENT
Supply Current
Standby Supply Current
A
RAMP
HVIN
HVIN
1.2600
1.2575
1.2550
1.2525
1.2500
1.2475
1.2450
1.2425
1.2400
= T
_______________________________________________________________________________________
DS(ON)
J
= 12V, C
= 48V, V
= V
-40
= -40°C to +125°C, unless otherwise noted. Typical values are at T
UNDERVOLTAGE LOCKOUT THRESHOLD
UVLO RISING
PARAMETER
UVLO
-25 -10 5
INBIAS
INBIAS
= 3V, T
vs. TEMPERATURE
TEMPERATURE (°C)
20
= 1µF, C
= 15V, C
35 50 65
A
= T
J
REGOUT
= -40°C to +125°C, unless otherwise noted. Typical values are at T
INBIAS
80
95
SYMBOL
110
= 2.2µF, R
t
I
PPWMD
t
V
= 1µF, C
T
V
BUVLO
t
PWQB
dILIM
T
UVLO
HYST
HYST
125
SH
REGOUT
RTCT
350
315
280
245
210
175
140
105
From CS rising (10mV overdrive) to
XFRMRL rising
Sinking 20mA
Temperature rising
V
V
From V
V
From V
V
From V
V
70
35
0
UVLO
UVLO
INBIAS
HVIN
UVLO
-40
STANDBY CURRENT vs. TEMPERATURE
= 25kΩ, C
-25
= 76V
= 2.2µF, R
= 3V
HVIN
INBIAS
HVIN
rising
= 0V
= 11V
-10 5 20 35 50
= 11V to 76V, V
= 76V
TEMPERATURE (°C)
RTCT
= 11V to 76V, V
CONDITIONS
RTCT
= 100pF, C
I
V
HVIN
UVLO
Typical Operating Characteristics
= 25kΩ, C
65 80
= 0V
A
= +25°C, unless otherwise noted.) (Note 1)
CSS
CSS
95
BST
= 0V,
110
RTCT
= 0V,
= 0.22µF, V
125
= 100pF, C
4.8
4.7
4.6
4.5
4.4
4.3
4.2
4.1
4.0
CSS
A
-40
1.14
-100
MIN
= +25°C, unless otherwise noted.)
V
INBIAS FLOATING
REGOUT = DRVIN
= V
-25 -10 5
HVIN
BST
CS
= 76V
= 0.22µF, V
HVIN INPUT CURRENT
= 0V, V
vs. TEMPERATURE
+160
TYP
160
200
300
140
0.7
4.4
TEMPERATURE (°C)
30
15
7
20
35 50 65
RAMP
+100
MAX
CSS
1.38
6.0
60
2
1
= V
= V
80
UVLO
95
CS
UNITS
110
mV
mA
mA
= 3V,
nA
ns
ns
ns
°C
°C
= 0V,
Ω
V
125