MAX5092AATE+T Maxim Integrated Products, MAX5092AATE+T Datasheet

IC REG LDO W/BOOST 16TQFN

MAX5092AATE+T

Manufacturer Part Number
MAX5092AATE+T
Description
IC REG LDO W/BOOST 16TQFN
Manufacturer
Maxim Integrated Products
Type
Step-Up (Boost)r
Datasheet
1.MAX5092AATE.pdf (24 pages)

Specifications of MAX5092AATE+T

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
2
Voltage - Output
3.3V, 1.5 ~ 9 V
Current - Output
250mA
Voltage - Input
3.5 ~ 72 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-TQFN Exposed Pad
Power - Output
2.67W
Polarity
Positive
Input Voltage Max
72 V
Output Voltage
1.5 V to 9 V or 3.3 V
Output Type
Adjustable, Fixed
Dropout Voltage (max)
1.6 V at 250 mA
Output Current
0.25 A
Line Regulation
1.6 mV / V
Load Regulation
0.2 mV / mA
Voltage Regulation Accuracy
1.5 %
Maximum Power Dissipation
2666 mW
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Reference Voltage
1.235 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Frequency - Switching
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
The MAX5092A/MAX5092B/MAX5093A/MAX5093B low-
quiescent-current, low-dropout (LDO) regulators contain
simple boost preregulators operating at a high frequency.
The devices seamlessly provide a preset 3.3V
(MAX5092A/MAX5093A) or 5V (MAX5092B/MAX5093B)
LDO output voltage from an automotive cold-crank
through load-dump (3.5V to 80V) input voltage condi-
tions. The MAX5092_/MAX5093_ deliver up to 250mA
with excellent load and line regulation. During normal
operation, when the battery is healthy, the boost preregu-
lator is completely turned off, reducing quiescent current
to 65µA (typ). This makes the devices suitable for
always-on power supplies.
The buck-boost operation achieved by this combination
of LDO and boost preregulator offers the advantage of
using a single off-the-shelf inductor in place of the mul-
tiple-winding custom magnetics needed in typical sin-
gle-ended primary inductor converter (SEPIC) and
transformer-based flyback topologies. The high operat-
ing frequency of the boost regulator significantly
reduces component size. The MAX5092_ integrates a
blocking diode to further reduce the external compo-
nent count. The boost preregulator output voltage is
preset to 7V. Both LDO and boost output voltages are
programmable using external resistors. The boost pre-
regulator output voltage is adjustable up to 11V
(MAX5092_), or up to 12V (MAX5093_). The LDO output
voltage is adjustable from 1.5V to 9V (MAX5092_) or
from 1.5V to 10V (MAX5093_).
The devices feature a shutdown mode with 5µA (typ)
shutdown current, a HOLD input to implement a self-hold-
ing circuit, and a power-on-reset output (RESET) with an
externally programmable timeout period. Additional fea-
tures include output overload, short-circuit, and thermal
protection.
The MAX5092_/MAX5093_ are available in a thermally
enhanced, 16-pin 5mm x 5mm thin QFN package and
can dissipate up to 2.7W at +70°C on a multilayer PC
board (PCB).
19-0659; Rev 1; 1/08
Typical Operating Circuit and Selector Guide appear at end
of data sheet.
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.
4V to 72V Input LDOs with Boost Preregulator
Automotive—Body Electronics
Automotive—ECU
Industrial
________________________________________________________________ Maxim Integrated Products
General Description
Applications
o Wide Operating Input Voltage Range: 3.5V to 72V
o LDO Output Regulates to 5V Seamlessly from an
o Up to 250mA Output Current
o Preset 3.3V, 5V, or Externally Programmable LDO
o Preset 7V or Externally Programmable Boost
o 65µA Quiescent Current in LDO Mode (V
o 5µA Shutdown Current
o Power-On Reset (RESET) with Programmable
o Output Short-Circuit and Thermal Protection
o TQFN Package Capable of Dissipating Up to 2.7W
+ Denotes lead-free package.
* EP = Exposed pad.
MAX5092AATE+
MAX5092BATE+
MAX5093AATE+
MAX5093BATE+
with a 4V Startup Voltage
Input Voltage of 3.5V to 72V
Output Voltage from 1.5V to 9V (MAX5092_) or
from 1.5V to 10V (MAX5093_)
Output Voltage Up to 11V (MAX5092_) or Up to
12V (MAX5093_)
Timeout Period
at +70°C
TOP VIEW
PART
RESET
BSFB
CT
VL
13
14
15
16
-40°C to +125°C 16 TQFN-EP*
-40°C to +125°C 16 TQFN-EP*
-40°C to +125°C 16 TQFN-EP*
-40°C to +125°C 16 TQFN-EP*
TEMP RANGE
+
Ordering Information
12
1
(5mm x 5mm)
THIN QFN
MAX5092_/
MAX5093_
11
2
Pin Configuration
10
3
PIN-
PACKAGE
9
4
Features
8
7
6
5
OUT
OUT_SENSE
SET
PGND_LDO
IN
≥8V)
T1655-3
T1655-3
T1655-3
T1655-3
CODE
PKG
1

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MAX5092AATE+T Summary of contents

Page 1

... Automotive—ECU Industrial Typical Operating Circuit and Selector Guide appear at end of data sheet. ________________________________________________________________ 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. o Wide Operating Input Voltage Range: 3.5V to 72V with a 4V Startup Voltage o LDO Output Regulates to 5V Seamlessly from an Input Voltage of 3 ...

Page 2

Input LDOs with Boost Preregulator ABSOLUTE MAXIMUM RATINGS IN, EN, LX, BSOUT to SGND..................................-0.3V to +80V PGND_BST, PGND_LDO to SGND .......................-0.3V to +0.3V RESET, OUT, OUT_SENSE to SGND .....................-0.3V to +12V BSOUT to LX (MAX5092_)......................................-0.3V to +12V ...

Page 3

Input LDOs with Boost Preregulator ELECTRICAL CHARACTERISTICS (continued 14V 1mA 47µ OUT IN noted. See Figures 4–7 as applicable. Typical specifications are at T PARAMETER SYMBOL ...

Page 4

Input LDOs with Boost Preregulator ELECTRICAL CHARACTERISTICS (continued 14V 1mA 47µ OUT IN noted. See Figures 4–7 as applicable. Typical specifications are at T PARAMETER SYMBOL ...

Page 5

Input LDOs with Boost Preregulator ( 14V 47µ BSOUT applicable.) QUIESCENT SUPPLY CURRENT vs. INPUT VOLTAGE (MAX5092B 100μA OUT ...

Page 6

Input LDOs with Boost Preregulator ( 14V 47µ BSOUT applicable.) LINE-TRANSIENT RESPONSE (V STEP FROM 4V TO 7V) IN MAX5092/93 toc09 I OUT V OUT 50mV/div V IN ...

Page 7

Input LDOs with Boost Preregulator ( 14V 47µ BSOUT applicable.) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY 8V -70 100 1k 10k 100k FREQUENCY (Hz) ...

Page 8

Input LDOs with Boost Preregulator ( 14V 47µ BSOUT applicable.) V vs. TEMPERATURE OUT 3.36 3.34 3.32 3.30 3.28 3. 10mA 100kΩ, OUT R4 ...

Page 9

Input LDOs with Boost Preregulator PIN NAME Input Supply Voltage. Bypass IN to the power ground plane with a 47µF (low-ESR) aluminum electrolytic 1 IN capacitor in parallel with a 1µF ceramic capacitor placed as close to ...

Page 10

Input LDOs with Boost Preregulator MAX5092_ ONE-SHOT OUT 2.25μs ONE-SHOT OUT IN BSOUT V DIS_TH BST_DIS OUT HOLD CONTROL LOGIC, THERMAL SHUTDOWN, AND OVERCURRENT EN PROTECTION CT COMPARATOR 0. REF Figure 1. MAX5092_ Functional Diagram ...

Page 11

Input LDOs with Boost Preregulator MAX5093_ ONE-SHOT OUT 2.25μs ONE-SHOT OUT IN BSOUT V DIS_TH BST_DIS OUT HOLD CONTROL LOGIC, THERMAL SHUTDOWN, AND OVERCURRENT EN PROTECTION CT COMPARATOR 0. REF Figure 2. MAX5093_ Functional Diagram ...

Page 12

Input LDOs with Boost Preregulator Detailed Description The MAX5092A/MAX5092B/MAX5093A/MAX5093B include a step-up, switch-mode DC-DC converter and a linear regulator to provide step-up/-down voltage con- version over a wide range of input voltages. This combi- nation of an ...

Page 13

Input LDOs with Boost Preregulator Internal Regulator (VL) An internal regulator (VL) is used to supply all internal low-voltage blocks. Bypass VL to SGND with a 1µF ceramic capacitor placed as close to the IC as possi- ...

Page 14

Input LDOs with Boost Preregulator INPUT 4V TO 72V C1* 47μF VOUT RESET ON OFF *** P *THESE CAPACITORS MUST BE RATED AT THE HIGHEST V **OUTPUT CURRENT IS LIMITED BY THE TOTAL POWER-DISSIPATION CAPABILITY OF THE ...

Page 15

Input LDOs with Boost Preregulator INPUT 4V TO 72V C1* 47μF VOUT RESET ON OFF *** P *THESE CAPACITORS MUST BE RATED AT THE HIGHEST V **OUTPUT CURRENT IS LIMITED BY THE TOTAL POWER-DISSIPATION CAPABILITY OF THE ...

Page 16

Input LDOs with Boost Preregulator INPUT 4V TO 72V C1* 47μF VOUT RESET ON OFF *** P *THESE CAPACITORS MUST BE RATED AT THE HIGHEST V **OUTPUT CURRENT IS LIMITED BY THE TOTAL OUTPUT POWER AND THE ...

Page 17

Input LDOs with Boost Preregulator 4.7μH INPUT 4V TO 72V C1* 47μF VOUT RESET ON OFF *** P *THESE CAPACITORS MUST BE RATED AT THE HIGHEST V **OUTPUT CURRENT IS LIMITED BY THE TOTAL OUTPUT POWER AND ...

Page 18

Input LDOs with Boost Preregulator Design Guidelines Input Capacitor (C Boost Capacitor (C BSOUT The input current waveform of the boost converter is continuous, and usually does not demand high capaci- tance at its input. However, the ...

Page 19

... The glitch immunity delay is directly proportional to the CT capacitor and is approximately 70µs for a 0.1µF capacitor at CT. ⎞ − 1 ⎟ ⎠ Dual Mode is a trademark of Maxim Integrated Products, Inc. CT Capacitor Selection ) is out of regulation. When OUT ) from CT to SGND (Figures 4–7). For calculate DELAY − ...

Page 20

Input LDOs with Boost Preregulator MAXIMUM POWER DISSIPATION vs. AMBIENT TEMPERATURE 3.0 2.5 2.0 1.5 1.0 0.5 0 -40 -25 - AMBIENT TEMPERATURE (°C) Figure 8. MAX5092/MAX5093 Package Power Dissipation Maximum Output Current ...

Page 21

Input LDOs with Boost Preregulator INPUT 4V TO 72V VOUT RESET OUTPUT ENABLE * P *SEE PCB LAYOUT GUIDELINES SECTION. PRESET LDO PART OUTPUT (V) MAX5092AATE+ 3.3 MAX5092BATE+ 5 MAX5093AATE+ 3.3 MAX5093BATE+ 5 ______________________________________________________________________________________ ...

Page 22

Input LDOs with Boost Preregulator (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) 22 ______________________________________________________________________________________ Package Information ...

Page 23

Input LDOs with Boost Preregulator (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Package Information (continued) 23 ...

Page 24

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 24 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products DESCRIPTION is a registered trademark of Maxim Integrated Products, Inc ...

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