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PDF MAX16990 Data sheet ( Hoja de datos )
| Número de pieza | MAX16990 | |
| Descripción | 2.5MHz Automotive Boost/SEPIC Controllers | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MAX16990 (archivo pdf) en la parte inferior de esta página. Total 21 Páginas | ||
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MAX16990/MAX16992
EVALUATION KIT AVAILABLE
36V, 2.5MHz Automotive Boost/
SEPIC Controllers
General Description
The MAX16990/MAX16992 are high-performance,
current-mode PWM controllers with 4μA (typ) shut-
down current for wide input voltage range boost/SEPIC
converters. The 4.5V to 36V input operating volt-
age range makes these devices ideal in automotive
applications such as for front-end “preboost” or “SEPIC”
power supplies and for the first boost stage in high-
power LED lighting applications. An internal low-dropout
regulator (PVL regulator) with a 5V output voltage
enables the MAX16990/MAX16992 to operate directly
from an automotive battery input. The input operating
range can be extended to as low as 2.5V when the
converter output is applied to the SUP input.
There are multiple versions of the devices offering one
or more of the following functions: a synchronization
output (SYNCO) for two-phase operation, an overvoltage
protection function using a separate input pin (OVP), and
a reference input pin (REFIN) to allow on-the-fly output
voltage adjustment.
The MAX16990 and MAX16992 operate in different
frequency ranges. All versions can be synchronized to
an external master clock using the FSET/SYNC input.
In addition, the MAX16990/MAX16992 have a factory-
programmable spread-spectrum option. Both devices
are available in compact 12-pin TQFN and 10-pin µMAX®
packages.
Applications
●● Automotive LED Lighting
●● Automotive Audio/Navigation Systems
●● Dashboards
Ordering Information appears at end of data sheet.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
Benefits and Features
●● Minimized Radio Interference with 2.5MHz Switching
Frequency Above the AM Radio Band
●● Space-Efficient Solution Design with Minimized
External Components
• 100kHz to 1MHz (MAX16990) and 1MHz to
2.5MHz (MAX16992) Switching-Frequency Ranges
• 12-Pin TQFN (3mm x 3mm) and 10-Pin μMAX
Packages
●● Spread Spectrum Simplifies EMI Management Design
●● Flexibility with Available Configurations for Boost,
SEPIC, and Multiphase Applications
• Adjustable Slope Compensation
• Current-Mode Control
• Internal Soft-Start (9ms)
●● Protection Features Support Robust Automotive
Applications
• Operating Voltage Range Down to 4.5V (2.5V or
Lower in Bootstrapped Mode), Immune to
Load-Dump Transient Voltages Up to 42V
• PGOOD Output and Hiccup Mode for Enhanced
System Protection
• Overtemperature Shutdown
• -40°C to +125°C Operation
Typical Application Circuit
22µF BOOTSTRAPPED 2.2MHz APPLICATION WITH LOW OPERATING VOLTAGE
BATTERY INPUT
2.5V to 40V
1µF
0.47µH
PVL
10kΩ
PGOOD
SUP
DRV N
1kΩ
ISNS
PVL
2.2µF MAX16992AUBA /B
FSET/SYNC
FB
COMP
22mΩ
12kΩ
GND EN
ENABLE
47µF
CERAMIC
17kΩ
91kΩ
PGOOD
13kΩ
N
P SW_OUT
8V/ 2A
10kΩ
N
19-6632; Rev 6; 8/15
1 page  
MAX16990/MAX16992
36V, 2.5MHz Automotive Boost/
SEPIC Controllers
Typical Operating Characteristics
(VSUP = 14V, TA = +25NC, unless otherwise noted.)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
1.4
1.2
1.0
2.2MHz
0.8
0.6
0.4 400kHz
0.2 VEN = VSUP
0 VFB = 1.1V
4 12 20 28
SUPPLY VOLTAGE (V)
36
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
10
9
8
7
6
5
4
3
3
2
1 VEN = 0V
0
4 12 20 28
SUPPLY VOLTAGE (V)
36
PVL VOLTAGE vs. SUPPLY VOLTAGE
5.2
5.1 IPVL = 1mA
5.0
4.9
4.8 IPVL = 10mA
4.7
4.6
4.5
4.4
4.3
4.2
4.1
4.0
4
12 20 28 36
SUPPLY VOLTAGE (V)
PVL VOLTAGE vs. SUPPLY VOLTAGE
5.2
5.0
4.8 IPVL = 1mA
4.6
IPVL = 10mA
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
34567
SUPPLY VOLTAGE (V)
MAX16990 INTERNAL OSCILLATOR
FREQUENCY vs. TEMPERATURE
420
415
410
405
400
395
390
385
380
-40 -20
RSET = 68.1kI
0 20 40 60 80 100 120
TEMPERATURE (°C)
MAX16992 INTERNAL OSCILLATOR
FREQUENCY vs. SUPPLY VOLTAGE
2400
2350
2300
2250
2200
2150
2100
2050
2000
4
RSET = 12.1kI
12 20 28
SUPPLY VOLTAGE (V)
36
SHUTDOWN SUPPLY CURRENT
vs. TEMPERATURE
5.2
5.0
4.8
4.6
4.4
4.2
4.0
3.8
VEN = 0V
3.6
-40 -20 0
20 40 60 80
TEMPERATURE (°C)
100 120
MAX16990 INTERNAL OSCILLATOR
FREQUENCY vs. SUPPLY VOLTAGE
410
408
406
404
402
400
398
396
394
392
390
4
RSET = 68.1kI
12 20 28
SUPPLY VOLTAGE (V)
36
MAX16992 INTERNAL OSCILLATOR
FREQUENCY vs. TEMPERATURE
2200
2190
2180
2170
2160
2150
2140
2130
2120
2110
2100
-40 -20
RSET = 12.1kI
0 20 40 60 80 100 120
TEMPERATURE (°C)
www.maximintegrated.com
Maxim Integrated │ 5
5 Page 
MAX16990/MAX16992
36V, 2.5MHz Automotive Boost/
SEPIC Controllers
Pin Descriptions (continued)
MAX16990AUBA/B, MAX16990ATCC/D, MAX16990ATCE/F,
MAX16992AUBA/B MAX16992ATCC/D MAX16992ATCE/F
μMAX-EP
TQFN-EP
TQFN-EP
— ——
NAME
EP
FUNCTION
Exposed Pad. Internally connected to GND.
Connect to a large ground plane to maximize
thermal performance. Not intended as an electrical
connection point.
Functional Diagram
SUP
(OVP)
EN
REF.
THERMAL
EN
THERMAL
5V REGULATOR
+ REFERENCE
UVLO
50µA x fSW
PVL
DRV
GND
FSET/SYNC
(SYNCO)
OSCILLATOR
CONTROL
LOGIC
250mV
8
BLANKING
TIME
ISNS
PGOOD
MAX16990
MAX16992
PGOOD
COMPARATOR
VPVL - 0.4V
COMP
FB
OTA
1V
(REFIN)
www.maximintegrated.com
Maxim Integrated │ 11
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet MAX16990.PDF ] | |
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