Rainbow Electronics MAX1637 - Manual (Page 4)

0
10
5
15
20
0 3 4 1 2 5 6 8 7 9
SUPPLY CURRENT
vs. LOAD CURRENT
MAX1637-07
LOAD CURRENT (A)
V
CC
+ V
GG
SUPPLY CURRENT (mA)
SYNC = HIGH
SYNC = LOW
SKIP = LOW
MAX1637
Miniature, Low-Voltage,
Precision Step-Down Controller
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V CC = V GG = 5V, SYNC = V CC , I REF = 0mA, T A = -40°C to +85°C , unless otherwise noted.) (Note 2)
SHDN, SKIP, SYNC
SHDN, SKIP, SYNC
% of nominal output
FB, with respect to regulation point
CONDITIONS
V 0.8 Logic Input Voltage Low
V 2.4 Logic Input Voltage High
% 60 80 Output Undervoltage Lockout Threshold
% 4.0 10 Overvoltage Trip Threshold
UNITS MIN TYP MAX PARAMETER
Note 1: Guaranteed by design, not production tested.
Note 2: Specifications from -40°C to 0°C are guaranteed by design and not production tested.
__________________________________________Typical Operating Characteristics
(V OUT = 3.3V, T A = +25°C, unless otherwise noted.)
100
50
0.01 10 1 0.1
EFFICIENCY vs. LOAD CURRENT
(1.7V/7A CIRCUIT)
70
60
90
80
MAX1637-01
LOAD CURRENT (A)
EFFICIENCY (%)
SKIP = LOW
V BATT = 7V
V BATT = 15V
V BATT = 22V
100
0
0.001 10 1 0.01 0.1
EFFICIENCY vs. LOAD CURRENT
(2.5V/3A CIRCUIT)
40
30
20
10
80
70
90
60
50
MAX1637-02
LOAD CURRENT (A)
EFFICIENCY (%)
V BATT = 15V
SKIP = LOW
V BATT = 7V
V BATT = 22V
100
50
0.01 10 1 0.1
EFFICIENCY vs. LOAD CURRENT
(2.5V/2A CIRCUIT)
70
60
90
80
MAX1637-03
LOAD CURRENT (A)
EFFICIENCY (%)
V BATT = 7V
SKIP = LOW
V BATT = 15V
V BATT = 22V
100
50
0.01 10 1 0.1
EFFICIENCY vs. LOAD CURRENT
(3.3V/3A CIRCUIT)
70
60
90
80
MAX1637-04
LOAD CURRENT (A)
EFFICIENCY (%)
V BATT = 5V
V BATT = 30V
V BATT = 15V
SKIP = LOW
0
10
5
15
20
3.0 4.0 3.5 4.5 5.0 5.5 6.0
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX1637-06
SUPPLY VOLTAGE (V)
V
CC
+ V
GG
SUPPLY CURRENT (mA)
I LOAD = 1A
V OUT = 3.3V
SKIP = HIGH
SKIP = LOW
OVERVOLTAGE PROTECTION
INPUTS AND OUTPUTS