MAX1537 Maxim Integrated Products, MAX1537 Datasheet - Page 4

• Manufacturer Part Number: MAX1537
• Description: Main Power-Supply Controllers
• Manufacturer: Maxim Integrated Products

High-Efficiency, 5x Output, Main Power-Supply
Controllers for Notebook Computers
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
I
4
LDO5
LDO3 Output Voltage
LDO3 Bootstrap Switch Threshold
LDO3 Bootstrap Switch
Resistance
Short-Circuit Current
Short-Circuit Current (Switched
Over to CSL_)
AUXILIARY LINEAR REGULATOR (MAX1537 ONLY)
LDOA Voltage Range
INA Voltage Range
LDOA Regulation Threshold,
Internal Feedback
ADJA Regulation Threshold,
External Feedback
ADJA Dual-Mode Threshold
ADJA Leakage Current
LDOA Current Limit
Secondary Feedback Regulation
Threshold
DL Duty Factor
INA Quiescent Current
INA Shunt Sink Current
INA Leakage Current
REFERENCE (REF)
Reference Voltage
Reference Load Regulation
REF Lockout Voltage
FAULT DETECTION
Output Overvoltage Trip
Threshold
Output Overvoltage Fault-
Propagation Delay
_______________________________________________________________________________________
= I
LDO3
PARAMETER
= I
LDOA
IN
= no load, T
= 12V, both SMPS enabled, V
A
V
= 0°C to +85°C, unless otherwise noted. Typical values are at T
I
SYMBOL
INA(SHDN)
REF(UVLO)
V
V
V
V
V
t
LDOA
I
LDO3
ADJA
OVP
INA
REF
INA
Standby mode, 6V < V
0 < I
Rising edge of CSL3, hysteresis = 1%
LDO3 to CSL3, V
I
LDO3 = LDO5 = GND,
CSL3 = CSL5 = GND
LDO3 = LDO5 = GND, V
V
ADJA = GND, 0 < I
V
0 < I
V
V
V
V
V
V
respect to switching period
V
V
V
V
I
Rising edge, hysteresis = 350mV
OVP = GND, with respect to error-
comparator threshold
50mV overdrive
LDO3
REF
CSL5
INA
INA
ADJA
LDOA
INA
INA
INA
INA
INA
INA
CC
CC
LOAD
LDOA
= 4.5V to 5.5V, I
= -10µA to +100µA
> 13V
- V
- V
> V
> 6V
= 24V, I
= 28V
= 5V, LDOA disabled
= 50mA
= 5V, FSEL = REF, SKIP = GND, V
> 4.7V
= 2.1V
forced to V
LDOA
LDOA
LDOA
< 100mA
< 120mA, V
LDOA
< 0.7V, pulse width with
CONDITIONS
+ 1V
CSL3
INA
= no load
LDOA
REF
- 1V, V
LDOA
= 3.2V,
IN
CSL3
< 120mA,
= 0
< 26V,
> 5.0V and
ADJA
> 3.1V,
= 1.9V,
ILIM_
1.985
1.980
= V
3.20
2.83
11.4
1.94
0.65
MIN
250
-0.1
150
0.1
10
5
6
8
A
LDO5
= +25°C.)
, V
TYP
3.35
12.0
2.00
0.15
2.00
1.95
150
0.8
33
50
11
10
1
INA
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= 15V, V
2.015
2.020
MAX
+0.1
3.42
3.10
12.4
2.06
0.95
220
165
0.2
23
24
30
15
3
LDOA
UNITS
mA
mA
mA
mA
= 12V,
µA
µA
µA
µs
%
%
Ω
V
V
V
V
V
V
V
V
V
V
V