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MAX1636 Datasheet(PDF) 3 Page - Maxim Integrated Products

Part No. MAX1636
Description  Low-Voltage, Precision Step-Down Controller for Portable CPU Power
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Maker  MAXIM [Maxim Integrated Products]
Homepage  http://www.maxim-ic.com
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MAX1636 Datasheet(HTML) 3 Page - Maxim Integrated Products

 
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Low-Voltage, Precision Step-Down
Controller for Portable CPU Power
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, SYNC = VL = VCC, IVL = 0mA, IREF = 0mA, TA = 0°C to +85°C, unless otherwise noted. Typical values
are at TA = +25°C.)
%
FB to DL delay, 22mV overdrive, CGATE = 2000pF
SHDN = GND, OVP = VCC
FB, with respect to regulation point
VCC = 5V, I(VL) = 0, V+ = 4.5V
(includes PNP base current)
VCC = 5V, I(VL) = 0
Guaranteed by design
SYNC = VCC
SYNC = GND
SYNC = VCC
I(VL) = 0 to 25mA, 5V < V+ < 30V
I(VL) = 0 to 25mA, 6V < V+ < 30V
Rising edge, hysteresis = 25mV
SYNC = GND
REF load = 0 to 50µA
SYNC = GND
°C
150
µs
1.25
%
4
7
10
kHz
240
340
SYNC Input Frequency Range
ns
200
SYNC Input Rise/Fall Time
ns
200
SYNC Input Pulse Width Low
200
Maximum Duty Factor, Dropout Mode
98
99
93
96
µA
60
Standby Supply Current (V+)
µA
500
Regulator Supply Current (V+)
60
91
94
170
200
230
270
300
330
kHz
V
4.5
5.0
5.3
4.7
5.0
5.3
VL Output Voltage
V
3.15
VL/ VCC Switchover Threshold
mV
10
REF Load Regulation
Hysteresis = 10°C
Rising edge, hysteresis = 25mV
V
3.45
3.60
3.75
VL Undervoltage Lockout Threshold
No REF load
V
1.090
1.100
1.110
REF Output Voltage
VCC = 3.3V to 5.5V
mV
3
REF Line Regulation
Oscillator Frequency
%
ns
SYNC Input Pulse Width High
Maximum Duty Factor
Overvoltage Trip Threshold
Thermal Shutdown Threshold
Overvoltage Fault Propagation Delay
%
Pin at GND or VCC; SKIP, OVP, SYNC
SHDN, SKIP, OVP, SYNC
SHDN, SKIP, OVP, SYNC
Falling edge (hysteresis = 1%)
From shutdown or power-on-reset state
% of nominal output
V
0.4
RESET Output Voltage Low
µA
-1
1
V
0.8
V
2.4
Logic Input Voltage High
clks
Catastrophic Output Undervoltage
Lockout Delay
Logic Input Voltage Low
Logic Input Bias Current
clks
32768
RESET Delay Time
%
-6
-3
RESET Trip Threshold
6144
Catastrophic Output Undervoltage
Lockout Threshold
60
70
80
ISINK = 4mA
+5.5V stress voltage applied
µA
1
RESET Output Leakage Current
CONDITIONS
UNITS
MIN
TYP
MAX
PARAMETER
SHDN = GND or V+
µA
-3
3
SHDN Input Bias Current
INTERNAL VL REGULATOR AND REFERENCE
OSCILLATOR
OVERVOLTAGE PROTECTION
INPUTS AND OUTPUTS


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