AT73C224-G_14 Datasheet, PDF (63/75 Pages) ATMEL Corporation – Ultra-low Power Real-time Clock (RTC) and Backup Battery Management

AT73C224
7.6.1 BUCK2: Typical Characteristics
Figure 7-3. Efficiency Manual/Automatic Modes
Efficiency VO2 = 0.9V - Manual Mode: PSK/PWM
100
95
90
85
VDD2 = 2.8V
80
75
70
VDD2 = 3.6V
65 VDD2 = 4.2V
60
55
50
VDD2 = 5V
45
40
35
VDD2 = 2.8V
30
25
VDD2 = 3.6V
20
VDD2 = 4.2V
15
10 VDD2 = 5V
5
0
0.001
0.01
Iload (A) ^0.1
PWM
PSK
Efficiency VO2 = 1.8V - Manual Mode: PSK/PWM
100
95
90
85
80
75
70
VDD2 = 2.8V
65
VDD2 = 3.6V
60
VDD2 = 4.2V
55
VDD2 = 5V
50
45
VDD2 = 2.8V
40
35
30
VDD2 = 3.6V
25
20
VDD2 = 4.2V
15
10
VDD2 = 5V
5
0
0.001
0.01
0.1
Iload (A)
PWM
PSK
Efficiency VO2 = 1.8V - Automatic Mode
100
95
90
85
80
75
70
VDD2 = 2.8V
65
VDD2 = 3.6V
60
VDD2 = 4.2V
55
VDD2 = 5V
50
45
Efficiency VO2 = 1.2V - Manual Mode: PSK/PWM
100
95
90
85
80
VDD2 = 2.8V
75
70
VDD2 = 3.6V
65
VDD2 = 4.2V
60
VDD2 = 5V
55
50
45
40
VDD2 = 2.8V
35
30
VDD2 = 3.6V
25
20
VDD2 = 4.2V
15
10
VDD2 = 5V
5
0
1
0.001
0.01
0.1
Iload (A)
PWM
PSK
1
Efficiency VO2 = 3.3V - Manual Mode: PSK/PWM
100
95
90
85
VDD2 = 4.2V
80
75
VDD2 = 5V
70
65
60
55
50
45
40
VDD2 = 4.2V
35
PWM
PSK
30
25
20
VDD2 = 5V
15
1
0.001
0.01
0.1
1
Iload (A)
Efficiency VO2 = 3.3V - Automatic Mode
100
95
90
85
VDD2 = 4.2V
80
VDD2 = 5V
75
70
65
60
0.001
0.01
0.1
1
0.001
0.01
0.1
1
Iload (A)
Iload (A)
63
6266A–PMAAC–08-Sep-08