Rainbow Electronics MAX15011 - Manual

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 67µA 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 microprocessor (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
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
♦ 67µA 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
Automotive 300mA LDO Regulators with
Switched Output and Overvoltage Protector
________________________________________________________________ Maxim Integrated Products 1
MAX15009
TQFN
(5mm x 5mm)
+
TOP VIEW
29
30
28
27
12
11
13
N.C. N.C.
SGND PGND RESET
14
N.C.
OC_DELAY OUT_LDO IN ILIM IN EN_PROT
1 2
OUT_SW
4 5 6 7
23 24 22 20 19 18
N.C.
N.C.
N.C.
SOURCE
GATE
N.C.
N.C.
OUT_LDO
3
21
31 10 N.C. FB_PROT
32 9 N.C. CT
OUT_SW
26 15 FB_LDO
*EP
*EP = EXPOSED PAD
N.C.
25 16 EN_LDO
N.C.
EN_SW
8
17
HOLD
Pin Configurations
19-0923; Rev 1; 2/08
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.
Typical Operating Circuits and Selector Guide appear at end
of data sheet.
Pin Configurations continued at end of data sheet.
Ordering Information
+ Denotes a lead-free package.
For tape and reel, add a T after “+.”
*
EP = Exposed pad.
EVALUATION KIT
AVAILABLE
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