MAX1636 Maxim, MAX1636 Datasheet - Page 5

• Manufacturer Part Number: MAX1636
• Description: Low-Voltage / Precision Step-Down Controller for Portable CPU Power
• Manufacturer: Maxim

ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, SYNC = VL = V
(Circuit of Figure 1, V
Note 1: Specifications to -40°C are guaranteed by design and not production tested.
__________________________________________Typical Operating Characteristics
OSCILLATOR
OVERVOLTAGE PROTECTION
INPUTS AND OUTPUTS
Oscillator Frequency
SYNC Input Pulse Width High
SYNC Input Pulse Width Low
SYNC Input Rise/Fall Time
SYNC Input Frequency Range
Overvoltage Trip Threshold
Catastrophic Output Undervoltage
Lockout Threshold
RESET Trip Threshold
Logic Input Voltage High
Logic Input Voltage Low
RESET Output Voltage Low
Gate-Driver On-Resistance
100
90
80
70
60
50
1m
V
IN
EFFICIENCY vs. LOAD CURRENT
= 15V
PARAMETER
V
10m
IN
(3.3V/3A CIRCUIT)
= 7V
LOAD CURRENT (A)
_______________________________________________________________________________________
IN
100m
= 7V, T
V
IN
= 22V
A
1
= +25°C, unless otherwise noted.)
V
IN
= 30V
Low-Voltage, Precision Step-Down
Controller for Portable CPU Power
10
SYNC = V
SYNC = GND
Guaranteed by design
FB, with respect to regulation point
% of nominal output
Falling edge (hysteresis = 1%)
SHDN, SKIP, OVP, SYNC
SHDN, SKIP, OVP, SYNC
I
High or low, DH or DL
SINK
CC
= 4mA
, I
100
90
80
70
60
50
VL
CC
1m
= 0mA, I
V
IN
EFFICIENCY vs. LOAD CURRENT
= 15V
V
CONDITIONS
IN
10m
= 7V
REF
(5V/3A CIRCUIT)
LOAD CURRENT (A)
= 0mA, T
100m
V
IN
= 22V
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
1
V
IN
= 30V
10
100
90
80
70
60
50
MIN
270
170
200
200
240
3.5
2.4
60
-7
1m
V
IN
EFFICIENCY vs. LOAD CURRENT
= 15V
TYP
10m
V
IN
(1.8V/1A CIRCUIT)
= 7V
LOAD CURRENT (A)
100m
MAX
330
230
200
340
-1.5
0.8
0.4
10
80
7
V
IN
= 22V
1
UNITS
kHz
kHz
ns
ns
ns
%
%
%
Ω
V
V
V
10
5