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MAX1999EEI+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32
MAX1777/MAX1977/MAX1999
High-Efficiency, Quad Output, Main Power-
Supply Controllers for Notebook Computers
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF, V+ = 12V, ON3 = ON5 = V
CC
, V
SHDN
= 5V,
T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER CONDITIONS
MIN TYP MAX
UNITS
Overvoltage Fault
Propagation Delay
FB3 or FB5 delay with 50mV overdrive 10 µs
PGOOD Threshold
FB3 or FB5 with respect to nominal output, falling edge,
typical hysteresis = 1%
-12
-9.5
-7 %
PGOOD Propagation Delay Falling edge, 50mV overdrive 10 µs
PGOOD Output Low Voltage I
SINK
= 4mA 0.3 V
PGOOD Leakage Current High state, forced to 5.5V 1 µA
Thermal Shutdown Threshold
160
o
C
Output Undervoltage
Shutdown Threshold
FB3 or FB5 with respect to nominal output voltage 65 70 75 %
Output Undervoltage
Shutdown Blanking Time
From ON_ signal 10 22 35 ms
INPUTS AND OUTPUTS
Feedback Input Leakage Current
V
FB3
= V
FB5
= 2.2V
-200 +40 +200
nA
Low level 0.6
PRO Input Voltage
High level 1.5
V
Low level 0.8
Float level 1.7 2.3SKIP Input Voltage
High level 2.4
V
Low level 0.8
TON Input Voltage
High level 2.4
V
Clear fault level/SMPS off level 0.8
Delay start level 1.7 2.3ON3, ON5 Input Voltage
SMPS on level 2.4
V
V
PRO
or V
TON
= 0 or 5V -1 +1
V
ON_
= 0 or 5V -2 +2
V
SKIP
= 0 or 5V -1 +1
V
SHDN
= 0 or 24V -1 +1
V
CS_
= 0 or 5V -2 +2
Input Leakage Current
V
ILIM3
, V
ILIM5
= 0 or 2V
-0.2 +0.2
µA
Rising edge 1.2 1.6 2.0
SHDN Input Trip Level
Falling edge
0.96 1.00 1.04
V
DH_ Gate-Driver
Sink/Source Current
DH3, DH5 forced to 2V 2 A
DL_ Gate-Driver Source Current DL3 (source), DL5 (source), forced to 2V 1.7 A
DL_ Gate-Driver Sink Current DL3 (sink), DL5 (sink), forced to 2V 3.3 A
DH_ Gate-Driver On-Resistance BST - LX_ forced to 5V 1.5 4.0 Ω
DL_, high state (pullup) 2.2 5.0
DL_ Gate-Driver On-Resistance
DL_, low state (pulldown) 0.6 1.5
Ω
MAX1777/MAX1977/MAX1999
High-Efficiency, Quad Output, Main Power-
Supply Controllers for Notebook Computers
_______________________________________________________________________________________ 5
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF, V+ = 12V, ON3 = ON5 = V
CC
, V
SHDN
= 5V,
T
A
= 0°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.)
PARAMETER CONDITIONS
MIN
MAX
UNITS
OUT3, OUT5 Discharge-Mode
On-Resistance
12 40 Ω
OUT3, OUT5 Discharge-Mode
Synchronous Rectifier
Turn-On Level
0.2 0.3 0.4 V
ELECTRICAL CHARACTERISTICS
(Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF, V+ = 12V, ON3 = ON5 = V
CC
, V
SHDN
= 5V,
T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER CONDITIONS
MIN TYP MAX
UNITS
MAIN SMPS CONTROLLERS
LDO5 in regulation 6 24
V+ Input Voltage Range
V+ = LDO5, V
OUT5
< 4.41V 4.5 5.5
V
3.3V Output Voltage in
Fixed Mode
V+ = 6V to 24V, FB3 = GND, V
SKIP
= 5V
3.27 3.39
V
V+ = 6V to 24V, FB5 = GND, V
SKIP
= 5V,
MAX1777/MAX1999 (TON = V
CC
)
5V Output Voltage in Fixed Mode
V+ = 7V to 24V, FB5 = GND, V
SKIP
= 5V,
MAX1977/MAX1999 (TON = GND)
4.95 5.15
V
Output Voltage in
Adjustable Mode
V+ = 6V to 24V, either SMPS
1.97 2.03
V
Output Voltage Adjust Range Either SMPS 2.0 5.5 V
FB3, FB5 Adjustable-Mode
Threshold Voltage
Dual-mode comparator 0.1 0.2 V
Current-Limit Threshold
(Positive, Default)
ILIM_ = V
CC
, GND - CS_ (MAX1777/MAX1977),
GND - LX_ (MAX1999)
90 110 mV
V
ILIM_
= 0.5V 40 60
V
ILIM_
= 1V 90 110
Current-Limit Threshold
(Positive, Adjustable)
GND - CS_
(MAX1777/MAX1977),
GND - LX_ (MAX1999)
V
ILIM_
= 2V
180
220
mV
V
OUT5
= 5.05V
1.895 2.315
MAX1777 or MAX1999
(V
TON
= 5V)
V
OUT3
= 3.33V
0.833 1.017
V
OUT5
= 5.05V
0.895 1.209
On-Time Pulse Width
MAX1977 or MAX1999
(V
TON
= 0)
V
OUT3
= 3.33V
0.475 0.635
µs
Minimum Off-Time
200
400 ns
INTERNAL REGULATOR AND REFERENCE
LDO5 Output Voltage
ON3 = ON5 = GND, 6V < V+ < 24V, 0 < I
LDO5
< 100mA 4.90 5.10
V
LDO5 Undervoltage
Lockout Fault Threshold
Falling edge of LDO5, hysteresis = 1% 3.7 4.3 V
MAX1777/MAX1977/MAX1999
High-Efficiency, Quad Output, Main Power-
Supply Controllers for Notebook Computers
6 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1 and Figure 2, no load on LDO5, LDO3, OUT3, OUT5, and REF, V+ = 12.0.V, ON3 = ON5 = V
CC
, V
SHDN
= 5V,
T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
PARAMETER CONDITIONS
MIN TYP MAX
UNITS
LDO5 Bootstrap Switch Threshold
Falling edge of OUT5, rising edge at OUT5 regulation
point
4.43 4.69
V
LDO5 Bootstrap
Switch Resistance
LDO5 to OUT5, V
OUT5
= 5V 3.2 Ω
LDO3 Output Voltage
ON3 = ON5 = GND, 6V < V+ < 24V, 0 < I
LDO3
< 100mA 3.27 3.43
V
LDO3 Bootstrap Switch Threshold
Falling edge of OUT3, rising edge at OUT3 regulation
point
2.80 3.02
V
LDO3 Bootstrap
Switch Resistance
LDO3 to OUT3, V
OUT3
= 3.2V 3.5 Ω
REF Output Voltage No external load
1.975 2.025
V
REF Load Regulation 0 < I
LOAD
< 50µA 10 mV
REF Sink Current REF in regulation 10 µA
V+ Operating Supply Current LDO5 switched over to OUT5, 5V SMPS 50 µA
V+ Standby Supply Current V+ = 6V to 24V, both SMPSs off, includes I
SHDN
300 µA
V+ Shutdown Supply Current V+ = 4.5V to 24V 15 µA
Quiescent Power Consumption
Both SMPSs on, FB3 = FB5 = SKIP = GND, V
OUT3
=
3.5V, V
OUT5
= 5.3V
4.5 mW
FAULT DETECTION
Overvoltage Trip Threshold FB3 or FB5 with respect to nominal regulation point +8 +14 %
PGOOD Threshold
FB3 or FB5 with respect to nominal output, falling edge,
typical hysteresis = 1%
-12 -7 %
PGOOD Output Low Voltage I
SINK
= 4mA 0.3 V
PGOOD Leakage Current High state, forced to 5.5V 1 µA
Output Undervoltage
Shutdown Threshold
FB3 or FB5 with respect to nominal output voltage 65 75 %
Output Undervoltage
Shutdown Blanking Time
From ON_ signal 10 40 ms
INPUTS AND OUTPUTS
Feedback Input Leakage Current
V
FB3
= V
FB5
= 2.2V
-200 +200
nA
Low level 0.6
PRO Input Voltage
High level 1.5
V
Low level 0.8
Float level 1.7 2.3
SKIP Input Voltage
High level 2.4
V
Low level 0.8
TON Input Voltage
High level 2.4
V
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32

MAX1999EEI+T

Mfr. #:
Buy MAX1999EEI+T
Manufacturer:
Maxim Integrated
Description:
IC REG QD BUCK/LNR SYNC 28QSOP
Lifecycle:
New from this manufacturer.
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