Typical operating characteristics, Electrical characteristics (continued) – Rainbow Electronics MAX1712 User Manual
Page 5
MAX1710/MAX1711/MAX1712
High-Speed, Digitally Adjusted
Step-Down Controllers for Notebook CPUs
_______________________________________________________________________________________
5
40
60
50
80
70
90
100
0.01
0.1
1
10
EFFICIENCY vs. LOAD CURRENT
(V
O
= 2.0V, f = 300kHz)
MAX1710-01
LOAD CURRENT (A)
EFFICIENCY (%)
V
IN
= 4.5V
V
IN
= 7V
V
IN
= 15V
V
IN
= 24V
40
60
50
80
70
90
100
0.01
0.1
1
10
EFFICIENCY vs. LOAD CURRENT
(V
O
= 1.6V, f = 300kHz)
MAX1710-02
LOAD CURRENT (A)
EFFICIENCY (%)
V
IN
= 4.5V
V
IN
= 24V
V
IN
= 7V
V
IN
= 15V
40
60
50
80
70
90
100
0.01
0.1
1
10
EFFICIENCY vs. LOAD CURRENT
(V
O
= 1.3V, f = 300kHz)
MAX1710-03
LOAD CURRENT (A)
EFFICIENCY (%)
V
IN
= 4.5V
V
IN
= 24V
V
IN
= 15V
V
IN
= 7V
40
60
50
80
70
90
100
0.01
0.1
1
10
EFFICIENCY vs. LOAD CURRENT
(V
O
= 1.6V, f = 550kHz)
MAX1710-04
LOAD CURRENT (A)
EFFICIENCY (%)
V
IN
= 4.5V
V
IN
= 15V
V
IN
= 7V
V
IN
= 24V
0
100
50
200
150
300
250
350
0.01
0.1
1
10
FREQUENCY vs. LOAD CURRENT
(V
O
= 1.6V)
MAX1710-05
LOAD CURRENT (A)
FREQUENCY (kHz)
V
IN
= 15V, PWM MODE
V
IN
= 4.5V, SKIP MODE
V
IN
= 15V, SKIP MODE
TON = OPEN
300
306
304
302
308
310
312
314
316
318
320
0
10
5
15
20
25
30
FREQUENCY vs. INPUT VOLTAGE
(I
O
= 7A)
MAX1710-06
INPUT VOLTAGE (V)
FREQUENCY (kHz)
V
O
= 2.0V
V
O
= 1.6V
TON = OPEN
Note 2: On-Time and Off-Time specifications are measured from 50% point to 50% point at the DH pin with LX forced to 0V, BST
forced to 5V, and a 250pF capacitor connected from DH to LX. Actual in-circuit times may differ due to MOSFET switching
speeds.
Note 3: Specifications from -40°C to 0°C are guaranteed but not production tested.
__________________________________________Typical Operating Characteristics
(7A CPU supply circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)
CONDITIONS
Measured at FB with respect to unloaded output voltage,
falling edge, hysteresis = 1%
%
-8.5
-2.5
PGOOD Trip Threshold
I
SINK
= 1mA
V
0.4
PGOOD Output Low Voltage
High state, forced to 5.5V
µA
1
PGOOD Leakage Current
UNIT
MIN
TYP
MAX
PARAMETER
ELECTRICAL CHARACTERISTICS (continued)
(Circuit of Figure 1, V
BATT
= 15V, V
CC
= V
DD
= 5V, SKIP = GND, T
A
= -40°C to +85°C, unless otherwise noted.) (Note 3)