Lo w -Vo lt a g e , P re c is io n S t e p -Do w n
Co n t ro lle r fo r P o rt a b le CP U P o w e r
MAX136
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, SYNC = VL = V , I = 0mA, I
= 0mA, T = -40°C to +85°C, unless otherwise noted.) (Note 1)
CC VL
REF
A
PARAMETER
OSCILLATOR
CONDITIONS
MIN
TYP
MAX
UNITS
SYNC = V
270
170
200
200
330
230
CC
Oscillator Frequency
kHz
SYNC = GND
SYNC Input Pulse Width High
SYNC Input Pulse Width Low
SYNC Input Rise/Fall Time
ns
ns
Guaranteed by design
200
340
ns
SYNC Input Frequency Range
OVERVOLTAGE PROTECTION
Overvoltage Trip Threshold
240
kHz
FB, with respect to regulation point
% of nominal output
3.5
60
-7
10
80
%
%
%
Catastrophic Output Undervoltage
Lockout Threshold
Falling edge (hysteresis = 1%)
-1.5
RESET Trip Threshold
INPUTS AND OUTPUTS
Logic Input Voltage High
Logic Input Voltage Low
RESET Output Voltage Low
Gate-Driver On-Resistance
2.4
V
V
V
Ω
SHDN, SKIP, OVP, SYNC
SHDN, SKIP, OVP, SYNC
0.8
0.4
7
I
= 4mA
SINK
High or low, DH or DL
Note 1: Specifications to -40°C are guaranteed by design and not production tested.
__________________________________________Typ ic a l Op e ra t in g Ch a ra c t e ris t ic s
(Circuit of Figure 1, V = 7V, T = +25°C, unless otherwise noted.)
IN
A
EFFICIENCY vs. LOAD CURRENT
(3.3V/3A CIRCUIT)
EFFICIENCY vs. LOAD CURRENT
(5V/3A CIRCUIT)
EFFICIENCY vs. LOAD CURRENT
(1.8V/1A CIRCUIT)
100
100
100
V
IN
= 7V
V
IN
= 7V
V
IN
= 15V
90
80
70
60
90
80
70
60
90
80
70
60
V
IN
= 15V
V
= 7V
IN
V
IN
= 15V
V
IN
= 30V
V
IN
= 22V
V
IN
= 30V
V
IN
= 22V
V
IN
= 22V
50
50
50
1m
10m
100m
LOAD CURRENT (A)
1
10
1m
10m
100m
1
10
1m
10m
100m
LOAD CURRENT (A)
1
10
LOAD CURRENT (A)
_______________________________________________________________________________________
5
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
