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33997

Features: • Operating Voltage Range 6.0 V up to 26.5 V (40 V transient)• Step-Down Switching Regulator Output VDDH = 5.0 V @ 1400 mA (total)• Linear Regulator with External Pass Transistor VDDL = 3.3 V @ 400 mA• Low-Power Standby Linear Regulator VKAM = 3.3 V @ 10 mA•...

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SeekIC No. : 004228621 Detail

33997: Features: • Operating Voltage Range 6.0 V up to 26.5 V (40 V transient)• Step-Down Switching Regulator Output VDDH = 5.0 V @ 1400 mA (total)• Linear Regulator with External Pass Tr...

33997 Data Sheet

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Part Number:
33997
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/4/27

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Product Details

Description



Features:

• Operating Voltage Range 6.0 V up to 26.5 V (40 V transient)
• Step-Down Switching Regulator Output VDDH = 5.0 V @ 1400 mA (total)
• Linear Regulator with External Pass Transistor VDDL = 3.3 V @ 400 mA
• Low-Power Standby Linear Regulator VKAM = 3.3 V @ 10 mA
• Two 5.0 V @ 200 mA (typical) Sensor Supplies VREF Protected Against Short-to-Battery and Short-to-Ground with Retry Capability
• Undervoltage Shutdown on the VDDL, VDDH Outputs with Retry Capability
• Reset Signals
• Power-Up Delay
• Enable Pins for Main Supplies (EN) and Sensor Supplies (SNSEN)
• Power Sequencing for Advanced Microprocessor Architectures
• SOIC-24WB Package


Pinout

Connection Diagram


Specifications

Parameter
Symbol
Value
Unit
Main Supply Voltage
Keep-Alive Supply Voltage
Switching Node
5.0 V Input Power
Sensor Supply


Keep-Alive Supply Voltage

Maximum Voltage at Logic I/O Pins
VPWR
KA_VPWR
VSW
VDDH
VREF1
VREF2
VKAM
EN
SNSEN
PWROK
VKAMOK
-0.3 to 45
-0.3 to 45
-0.5 to 45
-0.3 to 6.0
-0.3 to 18
-0.3 to 18
-0.3 to 6.0
-0.3 to 6.0
-0.3 to 6.0
-0.3 to 6.0
-0.3 to 6.0
V
V
V
V
V



V
V
Charge Pump Reservoir Capacitor Voltage
Error Amplifier Summing Node
Switching Regulator Output Feedback
VDDL Base Drive
VDDL Feedback
ESD Voltage
Human Body Model (all pins) (Note 1)
Machine Model (all pins) (Note 2)
CRES
VSUM
FBKB
DRVL
FBL
VESD1
VESD2
-0.3 to 18
-0.3 to 6.0
-0.3 to 6.0
-0.3 to 6.0
-0.3 to 6.0
±500
±100
V
V
V
V
V
V
Power Dissipation (TA = 25°C) (Note 3)
Thermal Resistance, Junction to Ambient (Note 4), (Note 5)
Thermal Resistance, Junction to Board (Note 6)
Operational Package Temperature [Ambient Temperature] (Note 7)
Operational Junction Temperature
Storage Temperature
Lead Soldering Temperature (Note 8)
PD
RJ-A
RJ-B
TA
TJ
TSTG
TS
800
60
20
-40 to 125
-40 to 150
-55 to 150
260
mW
°C/W
°C/W
°C
°C
°C
°C



Description

The 33997 is a medium-power, multi-output power supply integrated circuit that is capable of operating over a wide input voltage range, from 6.0 V up to 26.5 V with 40 V transient capability. It incorporates a sensorless current mode control step-down switching controller regulating directly to 5.0 V. The 3.3 V linear regulator uses an external pass transistor to reduce the 33997 power dissipation. The 33997 also provides a 3.3 V linear standby regulator and two 5.0 V sensor supply outputs protected by internal low-resistance LDMOS transistors.

There are two separate enable pins for the main and sensor supply outputs and standard supervisory functions such as resets with power-up reset delay.

The 33997 provides proper power supply sequencing for advanced microprocessor architectures such as the Motorola MPC5xx and 683xx microprocessor families.




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