MAX16920 Datasheet, PDF (7/20 Pages) Maxim Integrated Products – Automotive Power-Management IC with Three Step-Down Converters and Linear Regulator

Automotive Power-Management IC with
Three Step-Down Converters and Linear Regulator
Typical Operating Characteristics (continued)
(VINA = VINB = 14V, TA = +25°C, unless otherwise noted. Data measured on MAX16920B, see Figure 5 for application circuit.)
ODRV SWITCH ON/OFF
SB_OUT IS THE “DRAIN” SIDE OF THE
EXTERNAL pMOS CONNECTED AT ODRV
MAX16920 toc15
VIN_
10V/div
0V ^VODRV
10V/div
10V/div
0V
VSB_OUT
(100kI
LOAD AT
SB_OUT)
100ms/div
DC-DC1 EFFICIENCY vs. LOAD CURRENT
100
90
VIN = 8V
80
70
60
VIN = 14V VIN = 18V
50
40
30
20
10
EN2 = EN3 = ENA = GND
0
0.1
1
10
100
1000
IOUT1 (mA)
DC-DC2 EFFICIENCY vs. LOAD CURRENT
100
90
80
70
VIN = 8V
60
V_IN = 14V
VIN = 18V
50
40
30
20
10
EN3 = ENA = GND
0
60 120 180 240 300 360 420 480 540 600
IOUT2 (mA)
DC-DC3 EFFICIENCY vs. LOAD CURRENT
100
90
80
70
VIN = 8V
60
50
VIN = 14V
VIN = 18V
40
30
20
10
EN2 = ENA = GND
0
0.15 0.30 0.45 0.60 0.75 0.90 1.05 1.20 1.35 1.50
IOUT3 (A)
DC-DC1 STARTUP INTO FULL LOAD
MAX16920 toc19
10V/div
VIN
DC-DC2 STARTUP INTO FULL LOAD
MAX16920 toc20
5V/div
VEN2
2V/div
100mA/div
2V/div
VOUT1
IOUT1
VPOR
VOUT2
2V/div
IOUT2
200mA/div
VPG2
5V/div
2ms/div
1ms/div
DC-DC3 STARTUP INTO FULL LOAD
MAX16920 toc21
5V/div
2V/div
VEN3
VOUT3
IOUT3
1A/div
VPG3
5V/div
1ms/div
5V/div
LDOA STARTUP INTO FULL LOAD
MAX16920 toc22
VENA
VOUTA
2V/div
I_OUTA
50mA/div
5V/div
VPGA
100µs/div
7