Pmics with dynamic core for pdas and smart phones, Typical operating characteristics (continued) – Rainbow Electronics MAX1587A User Manual
Page 11
MAX1586A/MAX1586B/MAX1587A
High-Efficiency, Low-I
Q
PMICs with
Dynamic Core for PDAs and Smart Phones
______________________________________________________________________________________
11
960
1000
880
920
1040
2.5
3.5
3.0
4.0
4.5
5.0
5.5
SWITCHING FREQUENCY
vs. SUPPLY VOLTAGE
MAX1586A/86B/87A toc10
INPUT VOLTAGE (V)
SWITCHING FREQUENCY (kHz)
T
A
= -40°C
T
A
= +85°C
T
A
= +25°C
1.225
1.265
1.260
1.255
1.250
1.245
1.240
1.235
1.230
-40
-15
10
35
60
85
REFERENCE VOLTAGE
vs. TEMPERATURE
MAX1586A/86B/87A toc11
TEMPERATURE (°C)
REFERENCE VOLTAGE (V)
REG1 SWITCHING WAVEFORMS
WITH 800mA LOAD
MAX1586A/86B/87A toc12
400ns/div
0
0
500mA/div
10mv/div
AC-COUPLED
2V/div
V
LX1
I
L1
V1
REG1 SWITCHING WAVEFORMS
WITH 10mA LOAD
MAX1586A/86B/87A toc13
20µs/div
0
0
500mA/div
50mv/div
AC-COUPLED
2V/div
V
LX1
V1
I
L1
REG3 SWITCHING WAVEFORMS
WITH 250mA LOAD
MAX1586A/86B/87A toc14
400ns/div
0
0
500mA/div
10mv/div
AC-COUPLED
2V/div
V3
I
L3
V
LX3
REG3 PULSE-SKIP SWITCHING
WAVEFORMS WITH 10mA LOAD
MAX1586A/86B/87A toc15
10µs/div
0
0
500mA/div
10mv/div
AC-COUPLED
2V/div
V
LX3
V3
I
L3
Typical Operating Characteristics (continued)
(Circuit of Figure 5, V
IN
= 3.6V, T
A
= +25°C, unless otherwise noted.)