MAX5098AATJ+T Maxim Integrated Products, MAX5098AATJ+T Datasheet

IC CONV BUCK/BOOST DL 32TQFN-EP

MAX5098AATJ+T

Manufacturer Part Number
MAX5098AATJ+T
Description
IC CONV BUCK/BOOST DL 32TQFN-EP
Manufacturer
Maxim Integrated Products
Type
Step-Down (Buck), Step-Up (Boost)r
Datasheet
1.MAX5098AATJ.pdf (28 pages)

Specifications of MAX5098AATJ+T

Internal Switch(s)
Yes
Synchronous Rectifier
No
Number Of Outputs
2
Voltage - Output
0.8 ~ 0.85 V, 4.5 ~ 28 V
Current - Output
1A, 2A
Frequency - Switching
200kHz ~ 2.2MHz
Voltage - Input
4.5 ~ 19 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
32-TQFN Exposed Pad
Power - Output
2.76W
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX5098A is a dual-output, high-switching-frequen-
cy DC-DC converter with integrated n-channel switches
that can be used either in high-side or low-side configura-
tion. Each output can be configured either as a buck con-
verter or a boost converter. In the buck configuration, this
device delivers up to 2A from converter 1 and 1A from
converter 2. The MAX5098A also integrates a load-dump
protection circuitry that is capable of handling load-dump
transients up to 80V for automotive applications. The
load-dump protection circuit utilizes an internal charge-
pump to drive the gate of an external n-channel MOSFET.
When an overvoltage or load-dump condition occurs, the
series protection MOSFET absorbs the high voltage tran-
sient to prevent damage to lower voltage components.
The DC-DC converters operate over a wide operating
voltage range from 4.5V to 19V. The MAX5098A oper-
ates 180° out-of-phase with an adjustable switching fre-
quency to minimize external components while allowing
the ability to make trade-offs between the size, efficiency,
and cost. The high switching frequency (up to 2.2MHz)
also allows this device to operate outside the AM band
for automotive applications.
This device utilizes voltage-mode control for stable oper-
ation and external compensation, thus the loop gain is
tailored to optimize component selection and transient
response. This device can be synchronized to an exter-
nal clock fed at the SYNC input. Also, a clock output
(CKO) allows a master-slave connection of two devices
with a four-phase synchronized switching sequence.
Additional features include internal digital soft-start, indi-
vidual enable for each DC-DC regulator (EN1 and EN2),
open-drain power-good outputs (PGOOD1 and
PGOOD2), and a shutdown input (ON/OFF).
Other features of the MAX5098A include overvoltage pro-
tection, short-circuit (hiccup current limit) and thermal
protection. The MAX5098A is available in a thermally
enhanced, exposed pad, 5mm x 5mm, 32-pin TQFN
package and is fully specified over the automotive
-40°C to +125°C temperature range.
Pin Configuration appears 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.
19-4111; Rev 0; 5/08
Automotive AM/FM Radio Power Supply
Automotive Instrument Cluster Display
Converter with 80V Load-Dump Protection
Dual, 2.2MHz, Automotive Buck or Boost
________________________________________________________________ Maxim Integrated Products
General Description
Applications
o Wide 4.5V to 5.5V or 5.2V to 19V Input Voltage
o Dual-Output DC-DC Converter with Integrated
o Each Output Configurable in Buck or Boost Mode
o Adjustable Outputs from 0.8V to 0.85V
o I
o Switching Frequency Programmable from 200kHz
o Synchronization Input (SYNC)
o Clock Output (CKO) for Four-Phase Master-Slave
o Individual Converter Enable Input and Power-
o Low-I
o Internal Digital Soft-Start and Soft-Stop
o Short-Circuit Protection on Outputs and
o Overvoltage Protection on Outputs with Auto
o Thermal Shutdown
o Thermally Enhanced 32-Pin TQFN Package
+ Denotes a lead-free package.
* EP = Exposed pad.
Range (with Up to 80V Load-Dump Protection)
Power MOSFETs
Configuration) and from V
Configuration)
Buck Configuration
to 2.2MHz
Operation
Good Output
Maximum Duty-Cycle Limit
Restart
Dissipates up to 2.7W at +70°C
MAX5098AATJ+
OUT1
PART
Q
and I
(7µA) Standby Current (ON/OFF)
OUT2
of 2A and 1A (Respectively) in
-40°C to +125°C
Ordering Information
TEMP RANGE
IN
to 28V (Boost
PIN-PACKAGE
32 TQFN-EP*
Features
IN
Buck
1

Related parts for MAX5098AATJ+T

Image
Part Number
Description
Manufacturer
Datasheet
Request R
max5098a
Part Number:
max5098a
Description:
Dual, 2.2mhz, Automotive Buck Or Boost Converter With 80v Load-dump Protection
Manufacturer:
Maxim Integrated Products, Inc.
Datasheet:
MAX5098A.pdf (28 pages)
MAX7528KCWP
Part Number:
MAX7528KCWP
Description:
MAX7528KCWPMaxim Integrated Products [CMOS Dual 8-Bit Buffered Multiplying DACs]
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX7528KCWP.pdf (12 pages)
MAX3261CCJ
Part Number:
MAX3261CCJ
Description:
Single +5V, fully integrated, 1.25Gbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX3261CCJ.pdf (12 pages)
MAX3263CAG
Part Number:
MAX3263CAG
Description:
Single +5V, fully integrated, 155Mbps laser diode driver.
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX3263CAG.pdf (12 pages)
MAX8809AETL+
Part Number:
MAX8809AETL+
Description:
VRD11/VRD10, K8 Rev F 2/3/4-Phase PWM Controllers with Integrated Dual MOSFET Drivers
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX8809AETL.pdf (50 pages)
MAX1535CETJ+T
Part Number:
MAX1535CETJ+T
Description:
Highly Integrated Level 2 SMBus Battery Chargers
Manufacturer:
Maxim Integrated Products
Datasheet:
MAX1535CETJT.pdf (39 pages)
DS2741N+
Part Number:
DS2741N+
Description:
Current Monitor and Accumulator with Integrated Sense Resistor; ; Temperature Range: -40°C to +85°C
Manufacturer:
Maxim Integrated Products
MAX13450EAUD+T
Part Number:
MAX13450EAUD+T
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
MAX13451EAUD+T
Part Number:
MAX13451EAUD+T
Description:
TSSOP 14/A°/RS-485 Transceivers with Integrated 100O/120O Termination Resis
Manufacturer:
Maxim Integrated Products
MAX17497BATE+
Part Number:
MAX17497BATE+
Description:
QFN 16/A°/AC-DC and DC-DC Peak-Current-Mode Converters with Integrated Step
Manufacturer:
Maxim Integrated Products
MAX17502FATB+T
Part Number:
MAX17502FATB+T
Description:
TDFN/A/65V, 1A, 600KHZ, SYNCHRONOUS STEP-DOWN REGULATOR WITH INTEGRATED SWI
Manufacturer:
Maxim Integrated Products
MAX1978EVKIT
Part Number:
MAX1978EVKIT
Description:
Integrated Temperature Controller f
Manufacturer:
Maxim Integrated Products
MAX2606EUT+
Part Number:
MAX2606EUT+
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
MAX2608EUT+
Part Number:
MAX2608EUT+
Description:
SOT23-6/I°/45MHz to 650MHz, Integrated IF VCOs with Differential Output
Manufacturer:
Maxim Integrated Products
MAX2831EVKIT+
Part Number:
MAX2831EVKIT+
Description:
EVALUATION KIT/2.4GHZ TO 2.5GHZ 802.11G/B RF TRANSCEIVER WITH INTEGRATED PA
Manufacturer:
Maxim Integrated Products

MAX5098AATJ+T Summary of contents

Page 1

... Automotive AM/FM Radio Power Supply Automotive Instrument Cluster Display Pin Configuration appears 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 4.5V to 5.5V or 5.2V to 19V Input Voltage ...

Page 2

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection ABSOLUTE MAXIMUM RATINGS V+ to SGND............................................................-0.3V to +25V V+ to IN_HIGH...........................................................-19V to +6V IN_HIGH to SGND ..................................................-0.3V to +19V IN_HIGH Maximum Input Current .......................................60mA BYPASS to SGND..................................................-0.3V to +2.5V ...

Page 3

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection ELECTRICAL CHARACTERISTICS (continued) (VDRV = IN_HIGH = 5. IN_HIGH = 5.2V to 19V, EN_ = ...

Page 4

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection ELECTRICAL CHARACTERISTICS (continued) (VDRV = IN_HIGH = 5. IN_HIGH = 5.2V to 19V, EN_ = ...

Page 5

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection ELECTRICAL CHARACTERISTICS (continued) (VDRV = IN_HIGH = 5. IN_HIGH = 5.2V to 19V, EN_ = ...

Page 6

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection (See the Typical Application Circuit , unless otherwise noted that N1 is shorted externally.) OUTPUT1 EFFICIENCY vs. LOAD CURRENT 100 ...

Page 7

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection (See the Typical Application Circuit , unless otherwise noted that N1 is shorted externally.) LINE-TRANSIENT RESPONSE (BUCK CONVERTER) MAX5098A toc10 1ms/div CONVERTER 2 LOAD-TRANSIENT RESPONSE MAX5098A ...

Page 8

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection (See the Typical Application Circuit , unless otherwise noted that N1 is shorted externally.) OUT-OF-PHASE OPERATION (FSEL_1 = SGND) MAX5098A toc16 200ns/div EXTERNAL SYNCHRONIZATION (FSEL_1 = ...

Page 9

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection (See the Typical Application Circuit , unless otherwise noted that N1 is shorted externally.) BYPASS VOLTAGE vs. TEMPERATURE 2.010 5.5V ...

Page 10

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection (See the Typical Application Circuit , unless otherwise noted that N1 is shorted externally.) IN_HIGH CLAMP VOLTAGE vs. CLAMP CURRENT 20 +125°C A 20.2 ...

Page 11

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection PIN NAME Converter 2 Internal MOSFET Source Connection. For buck converter operation, connect SOURCE2 to the 1, 32 SOURCE2 switched side of the inductor. For boost operation, connect SOURCE2 ...

Page 12

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection PIN NAME 16 BYPASS Reference Output Bypass Connection. Bypass to SGND with a 0.22µF or greater ceramic capacitor. Converter 1 Frequency Select Input. Connect FSEL_1 FSEL_1 ...

Page 13

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection V+ MAX5098A IN_HIGH ON/OFF CONVERTER 1 MAXIMUM DUTY-CYCLE CKO1 OSCILLATOR FREQUENCY CONTROL BYPASS FREQUENCY FSEL_1 PWM DIVIDER COMPARATOR DIGITAL EN1 SOFT-START SYNC MAIN OSCILLATOR OVERVOLTAGE OSC VDRV CKO CKO2 ...

Page 14

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection Detailed Description The MAX5098A dual DC-DC converter uses a pulse- width-modulation (PWM) voltage-mode control scheme. On each converter the device includes one integrated n-channel MOSFET switch and requires an ...

Page 15

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection Internal Oscillator/Out-of-Phase Operation The internal oscillator generates the 180° out-of-phase clock signal required by each regulator. The switching frequency of each converter (f SW from 200kHz to 2.2MHz using ...

Page 16

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection DRAIN2 OUTPUT2 SOURCE2 SOURCE1 SYNC DUTY CYCLE = 50% CLKIN MASTER SYNC CKO (MASTER) CKO (SLAVE) SOURCE1 (MASTER) SYNC PHASE SOURCE2 (MASTER) SOURCE1 (SLAVE) SOURCE2 (SLAVE) ...

Page 17

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection DRAIN2 DRAIN1 OUTPUT2 SOURCE2 SOURCE1 MAX5098A FB2 FB1 V EN2 EN1 L PGOOD1 SEQUENCING—OUTPUT 2 DELAYED WITH RESPECT TO OUTPUT 1. Figure 2. Power-Supply ...

Page 18

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection Applications Information Setting the Switching Frequency The controller generates the clock signal by dividing down the internal oscillator f or the SYNC input sig- OSC nal when driven by ...

Page 19

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection Three key inductor parameters must be specified for operation with the MAX5098A: inductance value (L), peak inductor current (I ), and inductor saturation cur- L rent (I ). The ...

Page 20

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection where Δ ≅ Δ RIPPLE _ ESR ΔI is the peak-to-peak inductor current as calculated L above and f is the individual converter’s switching SW frequency. ...

Page 21

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection the capacitor discharge, and ΔV ESR due to the ESR of the capacitor. D duty cycle at minimum input voltage. Power Dissipation The MAX5098A includes two internal power MOSFET ...

Page 22

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection bandwidth and phase margin. Use a simple pole-zero pair (Type II) compensation if the output capacitor ESR zero frequency is below the unity-gain crossover fre- quency (f ). Type ...

Page 23

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection Place a zero Z 1 π × × where π × × ...

Page 24

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection Target the unity-gain crossover frequency for: f ZERO RHP , ≤ Place a zero π × × ...

Page 25

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection PCB Layout Guidelines Careful PCB layout is critical to achieve low switching losses and clean, stable operation. This is especially true for dual converters where one channel can affect ...

Page 26

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection Figure 7. 4.5V to 5.5V Operation 26 ______________________________________________________________________________________ ...

Page 27

Dual, 2.2MHz, Automotive Buck or Boost Converter with 80V Load-Dump Protection ______________________________________________________________________________________ Typical Application Circuit 27 ...

Page 28

... 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. 28 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2008 Maxim Integrated Products ...

Related keywords