MAX1533 Datasheet, PDF (5/38 Pages) Maxim Integrated Products – High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers

High-Efficiency, 5x Output, Main Power-Supply
Controllers for Notebook Computers
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V_IN = 12V, both SMPS enabled, V_CC = 5V, FSEL = REF, SKIP = GND, V_{ILIM_} = V_LDO5, V_INA = 15V, V_LDOA = 12V,
I_LDO5 = I_LDO3 = I_LDOA = no load, T_A = 0°C to +85°C, unless otherwise noted. Typical values are at T_A = +25°C.)
PARAMETER
Output Undervoltage-Protection
Trip Threshold
SYMBOL
CONDITIONS
MIN
With respect to error-comparator threshold 65
TYP MAX UNITS
70
75
%
Output Undervoltage Fault-
Propagation Delay
t_UVP
50mV overdrive
10
µs
Output Undervoltage-Protection
Blanking Time
PGOOD Lower Trip Threshold
PGOOD Propagation Delay
PGOOD Output Low Voltage
PGOOD Leakage Current
PGDLY Pullup Current
PGDLY Pulldown Resistance
PGDLY Trip Threshold
Thermal-Shutdown Threshold
GATE DRIVERS
DH_ Gate-Driver On-Resistance
DL_ Gate-Driver On-Resistance
DH_ Gate-Driver Source/Sink
Current
DL_ Gate-Driver Source Current
DL_ Gate-Driver Sink Current
Dead Time
LX_, BST_ Leakage Current
INPUTS AND OUTPUTS
Logic Input Voltage
Fault Enable Logic Input Voltage
Logic Input Current
SHDN Input Trip Level
ON_ Input Voltage
t_BLANK From rising edge of ON_
t_PGOOD_
I_PGOOD_
With respect to error-comparator
threshold, hysteresis = 1%
Falling edge, 50mV overdrive
I_SINK = 4mA
High state, PGOOD forced to 5.5V
PGDLY = GND
T_SHDN Hysteresis = 15°C
R_DH
R_DL
I_DH
I_DL
I_{DL (SINK)}
t_DEAD
BST_ - LX_ forced to 5V
DL_, high state
DL_, low state
DH_ forced to 2.5V,
BST_ - LX_ forced to 5V
DL_ forced to 2.5V
DL_ forced to 2.5V
DL_ rising
DH_ rising
V_BST_ = V_LX_ = 26V
SKIP, hysteresis = 600mV
OVP, UVP, ONA
OVP, UVP, SKIP, ONA
Rising trip level
Falling trip level
Clear fault level/SMPS off level
Delay start level (REF)
SMPS on level
High
Low
High
Low
6144 /
f_OSC
s
-14
-10
-7.5
%
10
µs
0.4
V
1
µA
4
5
6
µA
10
25
Ω
REF-
0.2
REF
REF+
0.2
V
+160
°C
1.5
5
Ω
1.7
5
Ω
0.6
3
2
A
1.7
A
3.3
A
35
ns
26
<2
20
µA
2.4
V
0.8
0.7 x
V_CC
V
0.4
-1
+1
µA
1.10
1.6
2.20
V
0.96
1
1.04
0.8
1.9
2.1
V
2.4
_______________________________________________________________________________________ 5