MAX1632AEAI Datasheet, PDF (4/29 Pages) Maxim Integrated Products – Multi-Output, Low-Noise Power-Supply Controllers for Notebook Computers

Multi-Output, Low-Noise Power-Supply
Controllers for Notebook Computers
ELECTRICAL CHARACTERISTICS (continued)
(V+ = 15V, both PWMs on, SYNC = VL, VL load = 0mA, REF load = 0mA, SKIP = 0V, T_A = T_MIN to T_MAX, unless otherwise noted.
Typical values are at T_A = +25°C.)
PARAMETER
CONDITIONS
FAULT DETECTION (MAX1630A/MAX1631A/MAX1632A)
Overvoltage Trip Threshold
With respect to unloaded output voltage
Overvoltage-Fault Propagation Delay CSL_ driven 2% above overvoltage trip threshold
Output Undervoltage Threshold
With respect to unloaded output voltage
Output Undervoltage Lockout Time From each SMPS enabled, with respect to f_OSC
Thermal Shutdown Threshold
Typical hysteresis = +10°C
MIN TYP MAX UNITS
4
7
10
%
1.5
µs
60
70
80
%
5000 6144 7000 Clks
150
°C
RESET
RESET Trip Threshold
With respect to unloaded output voltage,
falling edge; typical hysteresis = 1%
-7
-5.5
-4
%
RESET Propagation Delay
RESET Delay Time
INPUTS AND OUTPUTS
Feedback Input Leakage Current
Logic Input Low Voltage
Logic Input High Voltage
Input Leakage Current
Logic Output Low Voltage
Logic Output High Current
TIME/ON5 Input Trip Level
TIME/ON5 Source Current
TIME/ON5 On-Resistance
Gate Driver Sink/Source Current
Gate Driver On-Resistance
Falling edge, CSL_ driven 2%
below RESET trip threshold
With respect to f_OSC
FB3, FB5; SECFB = 2.6V
RUN/ON3, SKIP, TIME/ON5 (SEQ = REF),
SHDN, STEER, SYNC
RUN/ON3, SKIP, TIME/ON5 (SEQ = REF),
SHDN, STEER, SYNC
RUN/ON3, SKIP, TIME/ON5 (SEQ = REF),
SHDN, STEER, SYNC, SEQ; V_PIN = 0V or 3.3V
RESET, I_SINK = 4mA
RESET = 3.5V
SEQ = 0V or VL
TIME/ON5 = 0V, SEQ = 0V or VL
TIME/ON5; RUN/ON3 = 0V, SEQ = 0V or VL
DL3, DH3, DL5, DH5; forced to 2V
High or low
1.5
µs
27,000 32,000 37,000 Clks
1
50
nA
0.6
V
2.4
V
±1
µA
0.4
V
1
mA
2.4
2.6
V
2.5
3
3.5
µA
15
80
Ω
1
A
1.5
7
Ω
Note 1: Each of the four digital soft-start levels is tested for functionality; the steps are typically in 20mV increments.
Note 2: High duty-factor operation supports low input-to-output differential voltages, and is achieved at a lowered operating
frequency (see Overload and Dropout Operation section).
Note 3: MAX1630A/MAX1632A/MAX1633A/MAX1635A only.
Note 4: Off mode for the 12V linear regulator occurs when the SMPS that has flyback feedback (V_DD) steered to it is disabled. In
situations where the main outputs are being held up by external keep-alive supplies, turning off the 12OUT regulator pre-
vents a leakage path from the output-referred flyback winding, through the rectifier, and into V_DD.
Note 5: Since the reference uses VL as its supply, the reference’s V+ line-regulation error is insignificant.
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