User Manual

MAX15009/MAX15011
Automotive 300mA LDO Regulators with
Switched Output and Overvoltage Protector
6 _______________________________________________________________________________________
Typical Operating Characteristics
(V
IN
= V
EN_LDO
= V
EN_PROT
= V
EN_SW
= +14V, C
IN
= 10µF, C
OUT_LDO
= 22µF, C
OUT_SW
= 1µF, V
OUT_LDO
= +5V, FB_LDO = SGND,
T
A
= +25°C, unless otherwise specified.)
LDO GROUND CURRENT
vs. LOAD CURRENT
MAX15009 toc01
LOAD CURRENT (mA)
0 0.3 0.6 0.90.1 0.4 0.70.2 0.5 0.8 1.0
74
72
70
68
66
64
62
60
58
56
54
52
GROUND CURRENT (μA)
T
A
= -40°C
T
A
= +25°C
T
A
= +125°C
T
A
= +85°C
LDO GROUND CURRENT
vs. LOAD CURRENT
MAX15009 toc02
LOAD CURRENT (mA)
0 75 150 22525 100 17550 125 200 250 275 300
100
110
90
80
70
60
50
GROUND CURRENT (μA)
T
A
= -40°C
T
A
= +25°C
T
A
= +85°C
T
A
= +125°C
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
MAX15009 toc03
TEMPERATURE (°C)
-60 0-40 1008060 120-20 20 40 140
30
25
35
20
15
10
5
0
I
SHDN
(μA)
LDO LOAD-TRANSIENT RESPONSE
MAX15009 toc09
400μs/div
I
OUT_LDO
100mA/div
0A
V
OUT_LDO
5V, AC-COUPLED
100mV/div
LDO POWER-SUPPLY
REJECTION RATIO vs. FREQUENCY
MAX15009 toc04
FREQUENCY (Hz)
10 100k10k100 1k 1M
-10
-20
0
-30
-40
-50
-60
-70
-80
-90
LDO PSRR (dB)
I
OUT_LDO
= 10mA
V
IN
UVLO HYSTERESIS
vs. TEMPERATURE
MAX15009 toc05
TEMPERATURE (°C)
-50 7525-25 125500 100 150
400
350
300
250
200
150
100
UVLO HYSTERESIS (mV)
LDO LOAD REGULATION
MAX15009 toc06
I
OUT_LDO
(mA)
0 200100 300
5.10
5.08
5.06
5.04
5.02
5.00
4.98
4.96
4.94
4.92
4.90
V
OUT_LDO
(V)
LDO LOAD-TRANSIENT RESPONSE
MAX15009 toc08
2ms/div
V
OUT_LDO
5V, AC-COUPLED
20mV/div
I
OUT_LDO
100mA/div
0A
LDO OUTPUT VOLTAGE
vs. INPUT VOLTAGE
MAX15009 toc07
V
IN
(V)
025155352010 30 40
6
5
4
3
2
1
0
V
OUT_LDO
(V)
I
OUT_LDO
= 10mA
I
OUT_LDO
= 300mA
(PULSED)