MAX15009 Datasheet, PDF (1/23 Pages) Maxim Integrated Products – Automotive 300mA LDO Regulators with Switched Output and Overvoltage Protector

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.
Applications
Instrument Clusters
Climate Control
AM/FM Radio Power Supply
Multimedia Power Supply
Telematics Power Supply
Typical Operating Circuits and Selector Guide appear at end
of data sheet.
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
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX15009ATJ+ -40°C to +125°C 32 TQFN-EP** T3255-4
MAX15011ATJ+* -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.
TOP VIEW
Pin Configurations
24 23 22 21 20 19 18 17
HOLD 25
16 EN_LDO
N.C. 26
15 FB_LDO
OUT_SW 27
14 N.C.
OUT_SW 28
N.C. 29
MAX15009
13 SOURCE
12 GATE
N.C. 30
11 N.C.
N.C. 31
+
N.C. 32
*EP
10 FB_PROT
9 CT
1 2345678
*EP = EXPOSED PAD
TQFN
(5mm x 5mm)
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products 1
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