lx1665 Microsemi Corporation, lx1665 Datasheet - Page 5

• Manufacturer Part Number: lx1665
• Description: Dual Output Pwm Controllers With 5-bit Dac
• Manufacturer: Microsemi Corporation

95
90
85
80
75
70
1
2
Non-Synchronous Operation, V
Output Set Point
FIGURE 2 — Efficiency Test Results:
3
Note: Non-synchronous operation not recommended for 12V operation, due to power loss in Schottky diode.
EFFICIENCY AT 3.1V
EFFICIENCY AT 2.8V
EFFICIENCY AT 1.8V
4
5
6
FIGURE 4 — Efficiency Test Results: Synchronous Operation, V
I
7
OUT
P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
90
85
80
75
70
65
60
D
(A)
1
8
UAL
9
2
O
P
UTPUT
10
R O D U C T I O N
3
C H A R A C T E R I S T I C S C U R V E S
IN
= 5V
11
4
PWM C
12
Output Set Point
5
13
1.8V EFFICIENCY
2.8V EFFICIENCY
3.3V EFFICIENCY
6
14
ONTROLLERS WITH
7
I
OUT
LX1664/1664A, LX1665/65A
(A)
D
8
100
A T A
95
90
85
80
75
70
1
9
2
10
S
Output Set Point
3
H E E T
11
FIGURE 3 — Efficiency Test Results:
5-B
Synchronous Operation, V
EFFICIENCY AT 3.1V
EFFICIENCY AT 2.8V
EFFICIENCY AT 1.8V
4
12
IT
5
DAC
13
6
IN
= 12V.
14
7
I
OUT
(A)
8
9
10
IN
= 5V
11
12
13
14
5