MAX1533 Datasheet, PDF (7/38 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 = -40°C to +85°C, unless otherwise noted.) (Note 4)
PARAMETER
SYMBOL
CONDITIONS
MIN
FSEL = GND
170
Operating Frequency (Note 1)
f_OSC FSEL = REF
240
FSEL = V_CC
375
FSEL = GND
91
Maximum Duty Factor (Note 1)
D_MAX FSEL = REF
91
FSEL = V_CC
91
Minimum On-Time
CURRENT LIMIT
t_ON(MIN)
ILIM_ Adjustment Range
0.5
Current-Limit Threshold (Fixed)
V_LIMIT_ V_CSH_ - V_CSL_, ILIM_ = V_CC
67
Current-Limit Threshold
(Adjustable)
V_ILIM_ = 2.00V
170
V_LIMIT_ V_CSH_ - V_CSL_
V_ILIM_ = 1.00V
90
V_ILIM_ = 0.50V
40
INTERNAL FIXED LINEAR REGULATORS
MAX
230
330
575
UNITS
kHz
%
250
ns
V_REF
V
83
mV
230
110
mV
60
LDO5 Output Voltage
V_LDO5
ON3 = ON5 = GND, 6V < V_IN < 26V,
0 < I_LDO5 < 100mA
4.8
5.1
V
LDO5 Undervoltage-Lockout
Fault Threshold
Rising edge, hysteresis = 1%
3.75
4.30
V
LDO3 Output Voltage
V_LDO3
Standby mode, 6V < V_IN < 28V,
0 < I_LOAD < 100mA
AUXILIARY LINEAR REGULATOR (MAX1537 ONLY)
LDOA Voltage Range
V_LODA
INA Voltage Range
V_INA
LDOA Regulation Threshold,
Internal Feedback
ADJA = GND, 0 < I_LDOA < 120mA,
V_INA > 13V
3.20
5
6
11.40
3.43
V
23
V
24
V
12.55
V
ADJA Regulation Threshold,
External Feedback
ADJA Dual-Mode Threshold
V_ADJA
0 < I_LDOA < 120mA, V_LDOA > 5.0V and
V_INA > V_LDOA + 1V
ADJA
1.94
0.10
2.08
V
0.25
V
Secondary Feedback
Regulation Threshold
V_INA - V_LDOA
0.63
0.97
V
INA Quiescent Current
REFERENCE (REF)
Reference Voltage
I_INA
V_INA = 24V, I_LDOA = no load
V_REF V_CC = 4.5V to 5.5V, I_REF = 0
165
µA
1.97
2.03
V
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