MAX1761 Maxim, MAX1761 Datasheet - Page 7

• Manufacturer Part Number: MAX1761
• Description: Small / Dual / High-Efficiency Buck Controller for Notebooks
• Manufacturer: Maxim

(T
A
0.7
0.6
0.5
0.4
0.3
0.2
0.1
C
A
B
0
= +25°C, unless otherwise noted.)
4.5
A: V
B: INDUCTOR CURRENT, 1A/div
C: DL1, 5V/div
SUPPLY CURRENT vs. INPUT VOLTAGE
(2.5A COMPONENTS, V
OUT
6.5
LOAD-TRANSIENT RESPONSE
, AC-COUPLED, 10mV/div
8.5 10.5
INPUT VOLTAGE (V)
(SKIP MODE)
20 µs/div
12.5 14.5 16.5 18.5 20.5
_______________________________________________________________________________________
C
A
B
STARTUP AND SHUTDOWN WAVEFORMS
ON1 = VL, ON2 = VL
NO LOAD
A: V
B: INDUCTOR CURRENT, 2A/div
C: DL1, 5V/div
OUT
OUT
, 2V/div
= 2.5V)
(V
OUT
500 µs/div
= 1.8V)
C
30
25
20
15
10
A
B
5
0
Buck Controller for Notebooks
Typical Operating Characteristics (continued)
4.5
A: V
B: INDUCTOR CURRENT, 1A/div
C: DL1, 5V/div
SUPPLY CURRENT vs. INPUT VOLTAGE
(2.5A COMPONENTS, V
OUT
6.5
LOAD-TRANSIENT RESPONSE
, AC-COUPLED, 5mV/div
Small, Dual, High-Efficiency
8.5
INPUT VOLTAGE (V)
(PWM MODE)
10.5 12.5 14.5 16.5 18.5 20.5
20 µs/div
ON1 = VL, ON2 = FLOAT
NO LOAD
OUT
C
A
B
= 1.8V)
STARTUP AND SHUTDOWN WAVEFORMS
A: V
B: INDUCTOR CURRENT, 2A/div
C: DL1, 5V/div
OUT
, 2V/div
(V
OUT
500 µs/div
= 2.5V)
C
8
7
6
5
4
3
2
1
0
A
B
4.5
A: V
B: INDUCTOR CURRENT, 2A/div
C: DL1, 2V/div
OUTPUT OVERLOAD WAVEFORMS
OUT
6.5
NO-LOAD SUPPLY CURRENT vs.
INPUT VOLTAGE (SHUTDOWN)
, 1V/div
(I
8.5 10.5
OUT
INPUT VOLTAGE (V)
= 4V, V
100 µs/div
12.5 14.5 16.5 18.5 20.5
ON1 = GND, 0N2 = VL
OUT
= 2.5V)
7