ADT7350 ADTech, ADT7350 Datasheet

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ADT7350

Manufacturer Part Number
ADT7350
Description
step-down converter
Manufacturer
ADTech
Datasheet

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Part Number:
ADT7350
Manufacturer:
ADTECH
Quantity:
2 519
www.DataSheet.in
Sep. 9. 2010 / Rev. 0.0
General Description
Typical Application Circuit
Features
The ADT7350 is a step-down converter with
integrated switching MOSFET. It operates wide
input supply voltage range from 4.5V to 24V with
1.2A peak output current. It includes current
limiting protection and thermal shutdown.
It reduces design complexity and external
component count. The ADT7350 is available in
small outline SOT23-6L package.
• Current mode buck regulator with 1.4MHz
• Input voltage range : 4.5V to 24V
• Adjustable output range : 0.81V to 15V
• Max. output current : 1.2A
• Up to 92% Efficiency
• Internal Soft-Start Function
• Integrated Power MOSFET switch : 400mΩ
• Thermal shutdown & current limit protection
• SOT23-6L package
fixed frequency
1
2
3
BST
GND
FB
U1
VIN
SW
EN
6
5
4
* This specifications are subject to be changed without notice
CB
D1
C1
VIN
EN
L1
C2
R1
R2
1/9
VOUT
Applications
• Distributed Power Systems
• Surveillance Camera module
• Navigation
• Infra-Red LED Drivers
Package outline of the ADT7350
http://www.ad-tech.co.kr
ADT7350

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ADT7350 Summary of contents

Page 1

... General Description The ADT7350 is a step-down converter with integrated switching MOSFET. It operates wide input supply voltage range from 4.5V to 24V with 1.2A peak output current. It includes current limiting protection and thermal shutdown. It reduces design complexity and external component count. The ADT7350 is available in small outline SOT23-6L package. ...

Page 2

... Power supply input. The input bypass capacitor should be as close as GND pin. Switching node. The free-wheeling diode is connected between this pin and GND. 1 BST 2 GND This specifications are subject to be changed without notice 2/9 ADT7350 Value (Model) Manufacturer ADTech ROHM TDK - - - - - • ...

Page 3

... Error Comparator Amp 2 GND Symbol BST - P D Θ STG T Jmax Symbol OUT T OPR This specifications are subject to be changed without notice 3/9 ADT7350 Current - sense BST 1 Driver Control LOGIC SW 6 Min. Typ. Max -0 ...

Page 4

... EN FB 4.5V ≤ VIN ≤ 24V V = 0.81V FB ), (Note5) - DS. 0.81V 0.81V This specifications are subject to be changed without notice 4/9 ADT7350 Min. Typ. Max. Unit ㎂ - 0.2 - ㎃ 0.79 0.81 0.83 V ㎂ - 0.1 - Ω - 0.4 - ㎂ 1 ㎒ 1.2 1.4 1.7 ㎑ - 460 ...

Page 5

... Temperature Ambient Temperature[°C] Sep. 9. 2010 / Rev. 0.0 www.DataSheet.in V =12V IN V =5V OUT * This specifications are subject to be changed without notice 5/9 ADT7350 =25°C, Unless otherwise mentioned A Efficiency vs. Load current OUT Load current [A] Feedback voltage versus Temperature Ambient Temperature[°C] http://www.ad-tech.co.kr ...

Page 6

... No Load EN V OUT Iout=1A Resistive Load EN V OUT EN[1kHz] V OUT This specifications are subject to be changed without notice 6/9 ADT7350 =25°C, Unless otherwise noted A Start-up through Enable Start-up through Enable Dimming control http://www.ad-tech.co.kr ...

Page 7

... DETAILED DESCRIPTION Architecture and Operation The ADT7350 is a current mode step-down converter uses a PWM control and integrated Power Switch. An internal error amplifier establishes an integrated error voltage which is compared with slope compensated ramp signal in order to make internal Power Switch control signal. The ADT7350 has not only voltage feedback loop but also current feed-forward loop ...

Page 8

... DETAILED DESCRIPTION UVLO (Under Voltage Lock Out) ADT7350 can monitor the battery output voltage. If the battery output voltage is under 3.8V . The ADT7350 goes to the UVLO status to save the power consumption of applications. Oscillator The ADT7350 has a fixed frequency generator (typical 1.4MHz) and also automatically changes the operating frequency in accordance with feedback voltage (0 ...

Page 9

... This specifications are subject to be changed without notice 9/9 ADT7350 Dimensions In Inches Min Max 0.041 0.049 0.000 0.004 0.041 0.045 0.012 0.020 0.004 0.008 0.111 0.119 0.059 ...

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