19-0923; Rev 0; 8/07
Automotive 300mA LDO Regulators with
Switched Output and Overvoltage Protector
General Description
The MAX15009 includes a 300mA LDO regulator, a
switched output, and an overvoltage protection (OVP)
controller to protect downstream circuits from high-volt-
age load dump. The MAX15011 includes only the 300mA
LDO regulator and switched output. Both devices operate
over a wide supply voltage range from 5V to 40V and are
able to withstand load-dump transients up to 45V. The
MAX15009/MAX15011 feature short-circuit and thermal-
shutdown protection. These devices offer highly integrat-
ed power management solutions for automotive
applications such as instrument clusters, climate control,
and a variety of automotive power-supply circuits.
The 300mA LDO regulator consumes 70µA quiescent
current at light loads and is well suited to power always-
on circuits during “key off” conditions. The LDO features
independent enable and hold inputs, as well as a micro-
processor (µP) reset output with adjustable reset timeout
period.
The switched output of the MAX15009/MAX15011
incorporates a low R
DS(ON)
(0.28Ω, typ) pass transistor
switch internally connected to the output of the LDO
regulator. This switch features accurate current-limit
sensing circuitry and is capable of controlling remote
loads. The MAX15009/MAX15011 feature an adjustable
current limit and a programmable delay timer to set the
overcurrent detection blanking time of the switch and
autoretry timeout.
The MAX15009 OVP controller operates with an external
enhancement mode n-channel MOSFET. While the moni-
tored voltage remains below the adjustable threshold, the
MOSFET stays on. When the monitored voltage exceeds
the OVP threshold, the OVP controller quickly turns off the
external MOSFET. The OVP controller is configurable as a
load-disconnect switch or a voltage limiter.
The MAX15009/MAX15011 are available in a thermally
enhanced, 32-pin (5mm x 5mm), TQFN package and are
fully specified over the -40°C to +125°C automotive oper-
ating temperature range.
Features
♦
300mA LDO Regulator, Switched Output, and OVP
Controller (MAX15009)
♦
300mA LDO Regulator and Switched Output
(MAX15011)
♦
5V to 40V Wide Operating Supply Voltage Range
♦
45V Load Dump Protection
♦
70µA Quiescent Current LDO Regulator
♦
OVP Controller Disconnects or Limits Output
Voltage During Battery Overvoltage Conditions
♦
LDO Regulator with Enable, Hold, and Reset
Features
♦
Internal 0.28Ω (typ) n-Channel Switch for
Switched Output
♦
100mA Switched Output with Adjustable Current-
Limit Blanking/Autoretry Delay
MAX15009/MAX15011
Ordering Information
PART
MAX15009ATJ+
MAX15011ATJ+*
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
-40°C to +125°C 32 TQFN-EP** T3255-4
-40°C to +125°C 32 TQFN-EP** T3255-4
+Denotes
a lead-free package.
For tape and reel, add a T after “+.”
*Future
product—contact factory for availability.
**EP
= Exposed pad.
Pin Configurations
OC_DELAY
OUT_LDO
OUT_LDO
EN_SW
17
16
15
14
13
EN_LDO
FB_LDO
N.C.
SOURCE
GATE
N.C.
FB_PROT
CT
12
11
10
9
1
N.C.
2
N.C.
3
N.C.
4
N.C.
5
SGND
6
PGND
7
RESET
8
N.C.
TOP VIEW
ILIM
24
HOLD 25
N.C. 26
OUT_SW 27
OUT_SW 28
N.C. 29
N.C. 30
N.C. 31
N.C. 32
23
22
21
20
19
18
Applications
Instrument Clusters
Climate Control
AM/FM Radio Power Supply
Multimedia Power Supply
Telematics Power Supply
MAX15009
+
*EP
*EP = EXPOSED PAD
TQFN
(5mm x 5mm)
Typical Operating Circuits and Selector Guide appear at end
of data sheet.
Pin Configurations continued at end of data sheet.
1
________________________________________________________________
Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
EN_PROT
IN
IN
Automotive 300mA LDO Regulators with
Switched Output and Overvoltage Protector
MAX15009/MAX15011
ABSOLUTE MAXIMUM RATINGS
(All pins referenced to SGND, unless otherwise noted.)
IN, GATE.................................................................-0.3V to +45V
EN_LDO, EN_SW, EN_PROT ......................-0.3V to (V
IN
+ 0.3V)
SOURCE ......................................................-0.3V to (V
IN
+ 0.3V)
OUT_LDO, FB_LDO, FB_PROT,
RESET,
OC_DELAY .........................................................-0.3V to +12V
GATE to SOURCE ..................................................-0.3V to +12V
OUT_SW, ILIM,
HOLD
......................-0.3V to (V
OUT_LDO
+ 0.3V)
OUT_SW to OUT_LDO ...........................................-12V to +0.3V
CT to SGND............................................................-0.3V to +12V
SGND to PGND .....................................................-0.3V to +0.3V
IN, OUT_LDO Current .......................................................700mA
OUT_SW Current...............................................................350mA
Current Sink/Source (all remaining pins) ............................50mA
Continuous Power Dissipation (T
A
= +70°C)
32-Pin TQFN (derate 34.5mW/°C above +70°C) .............2.7W*
Thermal Resistance
θ
JA
..............................................................................29.0°C/W
θ
JC
................................................................................1.7°C/W
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
*As
per JEDEC 51 Standard, Multilayer Board (PCB).
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
IN
= +14V, V
SGND
= V
PGND
= 0V, C
GATE
= 6000pF, C
IN
= 10µF (ESR < 1.5Ω), C
OUT_LDO
= 22µF (ceramic), C
OUT_SW
= 1µF,
V
OUT_LDO
= 5V, C
T
= open, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Supply Voltage Range
SYMBOL
V
IN
CONDITIONS
V
IN
≥
V
OUT
+ 1.5V
EN_LDO = IN, EN_SW =
EN_PROT = 0V, I
OUT_LDO
= 0µA, LDO on, switch off,
protector off, measured
from SGND
EN_LDO = EN_SW = IN,
EN_PROT = 0V, LDO ON,
I
OUT_LDO
= 100µA, switch
on, I
OUT_SW
= 0µA,
protector off, measured
from SGND
EN_LDO = EN_SW =
EN_PROT = IN, LDO ON,
I
OUT_LDO
= 100µA, switch
on, I
OUT_SW
= 0µA,
protector on, measured
from SGND
EN_LDO = EN_SW = IN,
LDO ON, I
OUT_LDO
=
100µA, switch on, I
OUT_SW
= 0µA, measured from
SGND
T
A
= -40°C to
+85°C
T
A
= -40°C to
+125°C
4.10
4.27
260
MIN
5
TYP
MAX
40
UNITS
V
70
92
MAX15009
Supply Current
I
IN
290
360
µA
360
500
MAX15011
220
340
Shutdown Supply Current
I
SHDN
EN_LDO = EN_SW =
EN_PROT = SGND,
measured from
SGND
16
30
µA
40
4.45
V
mV
IN Undervoltage Lockout
IN Undervoltage Lockout
Hysteresis
V
UVLO
V
UVLO_HYST
V
IN
falling, GATE disabled
2
_______________________________________________________________________________________
Automotive 300mA LDO Regulators with
Switched Output and Overvoltage Protector
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +14V, V
SGND
= V
PGND
= 0V, C
GATE
= 6000pF, C
IN
= 10µF (ESR < 1.5Ω), C
OUT_LDO
= 22µF (ceramic), C
OUT_SW
= 1µF,
V
OUT_LDO
= 5V, C
T
= open, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
Thermal-Shutdown
Temperature
Thermal Hysteresis
LDO
I
LOAD
= 1mA, FB_LDO = SGND
Output Voltage
V
OUT_LDO
I
LOAD
= 300mA, V
IN
= 8V,
FB_LDO = SGND
With respect to SGND, I
LOAD
= 1mA,
V
OUT_LDO
= 5V, adjustable output option
FB_LDO rising
FB_LDO falling
V
FB_LDO
= 1V
Adjustable output option (Note 2)
I
LOAD
= 300mA (Note 3)
I
LOAD
= 200mA (Note 3)
(Note 4)
OUT_LDO = SGND, V
IN
= 6V
6V
≤
V
IN
≤
40V, I
LOAD
= 1mA,
V
OUT_LDO
= 5V
ΔV
OUT
/
ΔV
IN
6V
≤
V
IN
≤
40V, I
LOAD
= 1mA,
FB_LDO = SGND, V
OUT_LDO
= 3.3V
6V
≤
V
IN
≤
40V, I
LOAD
= 20mA,
FB_LDO = SGND, V
OUT_LDO
= 5V
6V
≤
V
IN
≤
40V, I
LOAD
= 20mA,
V
OUT_LDO
= 3.3V
ΔV
OUT
/
ΔI
OUT
1mA to 300mA, V
IN
= 8V,
FB_LDO = SGND
1mA to 300mA, V
IN
= 6.3V,
V
OUT_LDO
= 3.3V
I
LOAD
= 10mA, f = 100Hz, 500mV
P-P
,
V
OUT_LDO
= 5V
300
330
500
0.03
0.03
0.27
0.27
0.054
0.038
60
700
0.2
0.1
mV/V
1
0.5
0.15
mV/mA
0.100
dB
-100
1.8
800
520
4.92
4.88
1.21
5.00
5.00
1.235
0.125
0.064
+100
11.0
1500
1000
5.09
5.11
1.26
V
SYMBOL
T
SHDN
T
HYST
CONDITIONS
MIN
TYP
+160
20
MAX
UNITS
°C
°C
MAX15009/MAX15011
FB_LDO Set-Point Voltage
Dual Mode™ FB_LDO
Threshold
FB_LDO Input Current
LDO Output Voltage
LDO Dropout Voltage
LDO Output Current
LDO Output Current Limit
V
FB_LDO
V
FB_LDO_TH
I
FB_LDO
V
LDO_ADJ
V
DO
I
OUT_LDO
I
LIM_LDO
V
V
nA
V
mV
mA
mA
OUT_LDO Line Regulation
OUT_LDO Load Regulation
OUT_LDO Power-Supply
Rejection Ratio
OUT_LDO Startup Delay
Time
PSRR
I
OUT_LDO
= 0mA, from EN_LDO rising to
t
STARTUP_DELAY
10% of V
OUT_LDO
(nominal),
FB_LDO = SGND
30
µs
Dual Mode is a trademark of Maxim Integrated Products, Inc.
_______________________________________________________________________________________
3
Automotive 300mA LDO Regulators with
Switched Output and Overvoltage Protector
MAX15009/MAX15011
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +14V, V
SGND
= V
PGND
= 0V, C
GATE
= 6000pF, C
IN
= 10µF (ESR < 1.5Ω), C
OUT_LDO
= 22µF (ceramic), C
OUT_SW
= 1µF,
V
OUT_LDO
= 5V, C
T
= open, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
OUT_LDO Overvoltage
Protection Threshold
OUT_LDO Overvoltage
Protection Sink Current
ENABLE/HOLD INPUTS
EN_LDO to EN_PROT Input
Threshold Voltage
EN_LDO, EN_PROT, EN_SW
Input Pulldown Current
HOLD
Input Threshold
Voltage
HOLD
Input Pullup
RESET
RESET
goes HIGH when rising
V
OUT_LDO
crosses this threshold,
FB_LDO = SGND
RESET
goes HIGH when rising
V
FB_LDO
crosses this threshold
RESET
goes LOW when falling
V
OUT_LDO
crosses this threshold,
FB_LDO = SGND
RESET
goes LOW when falling
V
FB_LDO
crosses this threshold
t
RESET_FALL
I
CT
V
CT_TH
V
OL
I
LEAK_RESET
V
OUT_LDO
falling, 0.1V/µs
V
CT
= 0V
V
CT
rising
I
SINK
= 1mA, output asserted
Output not asserted
1.50
1.190
90.0
92.5
95.0
%V
OUT_LDO
V
IH
V
IL
I
EN_PD
V
IH
V
IL
I
HOLD_PU
HOLD
is internally pulled high to
OUT_LDO
0.6
EN_ is internally pulled low to SGND
1.4
0.4
1
2
0.7
V
µA
V
µA
SYMBOL
V
OV_TH
I
OV
CONDITIONS
1mA sink from OUT_LDO
V
OUT_LDO
= V
OUT
(nominal) x 1.15
8
MIN
TYP
105
19
MAX
110
UNITS
%V
OUT_LDO
mA
RESET
Voltage Threshold
HIGH
V
R ESET_H
90.0
92.5
95.0
%V
FB_LDO
RESET
Voltage Threshold
LOW
88
90
92
%V
OUT_LDO
V
RESET_L
88
90
19
2
1.235
92
%V
FB_LDO
µs
V
OUT_LDO
to
RESET
Delay
CT Ramp Current
CT Ramp Threshold
RESET
Output-Voltage Low
RESET
Open-Drain
Leakage Current
2.35
1.270
0.1
150
µA
V
V
nA
LOAD DUMP PROTECTOR (MAX15009 only)
FB_PROT Threshold
V
TH_PROT
Voltage
FB_PROT Threshold
Hysteresis
FB_PROT Input Current
Startup Response Time
GATE Rise Time
V
HYST
I
FB_PROT
t
START
t
GATE
FB_PROT rising
1.20
1.235
4
1.27
V
%V
TH_PROT
V
FB_PROT
= 1.4V
EN_PROT rising, EN_LDO = IN, to
V
GATE
= 0.5V
GATE rising to +8V, V
SOURCE
= 0V
-100
20
1
+100
nA
µs
ms
4
_______________________________________________________________________________________
Automotive 300mA LDO Regulators with
Switched Output and Overvoltage Protector
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= +14V, V
SGND
= V
PGND
= 0V, C
GATE
= 6000pF, C
IN
= 10µF (ESR < 1.5Ω), C
OUT_LDO
= 22µF (ceramic), C
OUT_SW
= 1µF,
V
OUT_LDO
= 5V, C
T
= open, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 1)
PARAMETER
FB_PROT to GATE Turn-Off
Propagation Delay
SYMBOL
t
OV
CONDITIONS
FB_PROT rising from V
TH_PROT
-
250mV to V
TH_PROT
+ 250mV
V
SOURCE
= V
IN
= 5.5V,
R
GATE
to IN = 1MΩ
V
SOURCE
= V
IN
; V
IN
≥
14V,
R
GATE
to IN = 1MΩ
V
GATE
= 5V, V
EN_PROT
= 0V
GATE = SGND
12
V
IN
+
3.2
V
IN
+
7.0
V
IN
+
3.5
V
IN
+
8.1
63
45
16
18
MIN
TYP
MAX
0.6
V
IN
+
3.8
V
IN
+
9.5
100
UNITS
µs
MAX15009/MAX15011
GATE Output High Voltage
V
GATE
- V
IN
V
GATE Output Pulldown
Current
GATE Charge-Pump
Current
GATE-to-SOURCE Clamp
Voltage
SWITCH
Switch Dropout
I
GATEPD
I
GATE
V
CLMP
mA
µA
V
ΔV
SW
ΔV
SW
= V
OUT_LDO
- V
OUT_SW
,
I
OUT_SW
= 100mA, V
OUT_LDO
= 5V,
no external MOSFET
ILIM = OUT_LDO, V
IN
= 8V
170
85
30
36
200
100
40
0.395
1.194
1.235
16.0
1.00
12
38
70
240
120
50
mV
Switch Current Limit
I
SW_LIM
R
LIM
= 100kΩ to SGND,
V
OUT_LDO
= 5V, V
IN
= 8V
R
LIM
= 39kΩ to SGND,
V
OUT_LDO
= 5V, V
IN
= 8V
mA
Current-Limit Selector ILIM
Voltage
OC_DELAY Timeout
Threshold
OC_DELAY Timeout Pullup
Current
OC_DELAY Timeout
Pulldown Current
Minimum OC_DELAY
Timeout
EN_SW to OUT_SW
Turn-On Time
EN_SW to OUT_SW
Turn-Off Propagation Delay
V
ILIM
V
OC_DELAY
I
OC_DELAY_UP
I
OC_DELAY_DOWN
t
OC_DELAY_MIN
R
LIM
= 100kΩ
V
1.270
21.3
1.40
V
µA
µA
µs
µs
V
OC_DELAY
= 0.5V rising
V
OC_DELAY
= 0.5V, falling
C
OC_DELAY
is unconnected
OUT_SW rising to +0.5V,
R
OUT_SW
= 1kΩ
12.5
0.75
t
OV_SW
EN_SW falling, V
OUT_LDO
- V
OUT_SW
rising to +1V, R
OUT_SW
= 1kΩ,
V
OUT_LDO
= 5V
18
µs
Note 1:
Note 2:
Note 3:
Note 4:
Specifications to -40°C are guaranteed by design and not production tested.
1.8V is the minimum limit for proper
HOLD
functionality.
Dropout is defined as V
IN
- V
OUT_LDO
when V
OUT_LDO
is 98% of the value of V
OUT_LDO
for V
IN
= V
OUT_LDO
+ 1.5V.
Maximum output current may be limited by the power dissipation of the package.
_______________________________________________________________________________________
5
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