Typical operating characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX1636 User Manual
Page 5
MAX1636
Low-Voltage, Precision Step-Down
Controller for Portable CPU Power
_______________________________________________________________________________________
5
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V+ = 15V, SYNC = VL = V
CC
, I
VL
= 0mA, I
REF
= 0mA, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 1)
FB, with respect to regulation point
Guaranteed by design
SYNC = GND
SYNC = V
CC
%
3.5
10
Oscillator Frequency
ns
SYNC Input Pulse Width High
Overvoltage Trip Threshold
kHz
240
340
SYNC Input Frequency Range
%
ns
200
SYNC Input Rise/Fall Time
ns
200
SYNC Input Pulse Width Low
SHDN, SKIP, OVP, SYNC
SHDN, SKIP, OVP, SYNC
200
Falling edge (hysteresis = 1%)
% of nominal output
V
0.4
RESET Output Voltage Low
V
0.8
V
170
230
2.4
270
330
Logic Input Voltage High
kHz
Logic Input Voltage Low
%
-7 -1.5
RESET Trip Threshold
Catastrophic Output Undervoltage
Lockout Threshold
60
80
I
SINK
= 4mA
High or low, DH or DL
Ω
7
Gate-Driver On-Resistance
CONDITIONS
UNITS
MIN
TYP
MAX
PARAMETER
OSCILLATOR
OVERVOLTAGE PROTECTION
INPUTS AND OUTPUTS
__________________________________________Typical Operating Characteristics
(Circuit of Figure 1, V
IN
= 7V, T
A
= +25°C, unless otherwise noted.)
100
50
1m
100m
1
10m
10
EFFICIENCY vs. LOAD CURRENT
(3.3V/3A CIRCUIT)
60
MAX1636 TOC01
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
V
IN
= 22V
V
IN
= 30V
V
IN
= 7V
V
IN
= 15V
100
50
1m
100m
1
10m
10
EFFICIENCY vs. LOAD CURRENT
(5V/3A CIRCUIT)
60
MAX1636 TOC02
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
V
IN
= 22V
V
IN
= 7V
V
IN
= 15V
V
IN
= 30V
100
50
1m
100m
1
10m
10
EFFICIENCY vs. LOAD CURRENT
(1.8V/1A CIRCUIT)
60
MAX1636 TOC03
LOAD CURRENT (A)
EFFICIENCY (%)
70
80
90
V
IN
= 15V
V
IN
= 7V
V
IN
= 22V
Note 1: Specifications to -40°C are guaranteed by design and not production tested.