MAX16923GTPBV [MAXIM]
Automotive 4-Output Display Power Solution with Watchdog;
| 型号： | MAX16923GTPBV |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Automotive 4-Output Display Power Solution with Watchdog |
| 文件： | 总3页 (文件大小：187K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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MAX16923
Automotive 4-Output Display Power Solution
with Watchdog
General Description
Benefits and Features
The MAX16923 is a 4-channel power-management IC de-
signed to accommodate the main rails used in modern
automotive TFT displays. The MAX16923 and the
MAX20069 TFT power supply and LED backlight driver
combine to provide a two-chip solution to all automotive
display power supply requirements.
● High Integration
• Complete Display Power Solution from Automotive
Battery
• One High-Voltage 2.1A Buck Converter (5V or
3.3V)
• One High-Voltage 100mA Low-I Linear Regulator
Q
(3.3V)
The MAX16923 integrates a high-voltage buck converter
that transforms battery voltages into a 5V or 3.3V interme-
diate rail. In addition, a high-voltage, always-on, low qui-
escent current linear regulator supplies power at 3.3V.
• One Low-Voltage 1.6A Buck Converter (3.3V, 1.8V,
1.2V, or 1.1V)
• One Low-Voltage Linear Regulator (3.3V, 1.8V,
1.5V, or 1.0V)
The low-voltage section consists of a fully-integrated DC/
DC converter and an LDO running off the intermediate rail.
Section output power is available in several low-voltage
combinations (see the Ordering Information table). In ad-
dition, an integrated watchdog timer guards against run-
away code.
• MAX16923GTPB: 75mA
• MAX16923GTPC/MAX16923GTPE: 175mA
• All other variants: 180mA
• Power-Good Outputs
● Integrated Watchdog Timer
● Robust and Low EMI
A single START control pin initiates the start-up sequence,
thereby simplifying device control. The MAX16923's ex-
ternal pMOSFET control block allows battery voltage to
be switched to a downstream device, such as a backlight
boost converter.
● • Programmable Switching Frequency
• Internal Spread Spectrum Oscillator
• Slew-Rate Controlled Switching
• Thermal Shutdown Protection
● Compact TQFN20 4mm x 4mm Package
The MAX16923 is available in a TQFN package and oper-
ates in the -40°C to 105°C temperature range.
Ordering Information appears at end of datasheet.
Applications
Simplified Block Diagram
● Infotainment Displays
● Central Information Displays
● Instrument Clusters
BATT PGB WDI WAKE
BSTB
LDO1
HV LDO
PG1
HIGH-
VOLTAGE
BUCK
WATCH
-DOG
LX
FIN
PGATE
BIAS
RT
V5
OSC.
PGATE
CONTROL
LOW-
VOLTAGE
BUCK
LDO2
LV LDO
LXC
PGND
TEMP
SENSOR
SEQUENCING
&
CONTROL
V33
PGOOD
START
MAX16923
GND
19-100619; Rev 3; 10/19
MAX16923
Automotive 4-Output Display Power Solution with
Watchdog
2. Keep the high-current paths short, especially at the ground terminals. This practice is essential for stable, jitter-free
operation. The high current path—consisting of the input capacitor, the MAX16923 internal FETs, the inductor, the
external diode, and the output capacitor—should be as short as possible.
3. Keep the power traces and load connections short. This practice is essential to achieving high efficiency. Use thick
copper PCBs (2oz as opposed to 1oz) to enhance full-load efficiency.
4. Place the BIAS bypass capacitor as close as possible to the BIAS pin.
5. Refer to the MAX16923EVKIT evaluation kit for an example of an optimal layout template.
Typical Application Circuits
MAX16923A - HV Buck Operating at 400KHz
Battery
Input
Backlight
Circuit
10mF
0.1mF
BSTB
20kW
BATT
PGATE
LDO1
3.3V, always on
0.1mF
22mF
10mF
10mH
5V
LX
BIAS
3x22mF
SBR3U60P
1mF
LDO2
3.3V
V5
RT
MAX16923
10kW
2.2mH
PG1
PGOOD
PGB
3.3V
LXC
22mF
System
V33
Interface
START
PGND
FIN
GND
WAKE
WDI
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Maxim Integrated | 19
MAX16923
Automotive 4-Output Display Power Solution with
Watchdog
Typical Application Circuits (continued)
MAX16923A - HV Buck Operating at 2MHz
Battery
Backlight
Circuit
10mF
0.1mF
BSTB
Input
20kW
BATT
PGATE
LDO1
3.3V, always on
0.1mF
22mF
10mF
2.2mH
5V
LX
BIAS
2x22mF
SBR3U60P
1mF
LDO2
3.3V
V5
RT
MAX16923
56kW
2.2mH
PG1
PGOOD
PGB
3.3V
LXC
22mF
System
V33
Interface
START
PGND
FIN
GND
WAKE
WDI
Ordering Information
PART NUMBER
TEMP RANGE
PIN_PACKAGE
V5 SETTING
5V
V33 SETTING
3.3V
LDO2 SETTING
MAX16923GTPA/V+
MAX16923GTPB/V+**
MAX16923GTPC/V+
MAX16923GTPD/V+**
MAX16923GTPE/V+**
MAX16923GTPF/V+**
MAX16923GTPG/V+**
-40°C to +105°C
-40°C to +105°C
-40°C to +105°C
-40°C to +105°C
-40°C to +105°C
-40°C to +105°C
-40°C to +105°C
20 TQFN-EP
20 TQFN-EP
20 TQFN-EP
20 TQFN-EP
20 TQFN-EP
20 TQFN-EP
20 TQFN-EP
3.3V
3.3V
1.8V
1.8V
1.8V
1V
3.3V
3.3V
5V
1.2V
1.1V
1.1V
1.8V
1.8V
1.8V
3.3V
3.3V
3.3V
1.5V
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T Denotes tape-and-reel.
/V Denotes an automotive qualified part
** Future product - contact factory for availability
www.maximintegrated.com
Maxim Integrated | 20
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