L5970ADTR STMicroelectronics, L5970ADTR Datasheet
L5970ADTR
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L5970ADTR Summary of contents
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... VREF 6 VCC 8 L5970AD SYNC. 2 COMP INH GND 22nF C3 R3 4.7K SO-8 Part Number L5970AD L5970ADTR SO-8 in Tape & Reel Description of 200mΩ) as switching DSON L1 15µH VOUT=3.3V OUT STPS2L25U 5. 3.3K D05IN1530 L5970AD Package SO-8 C2 330µF 10V Rev ...
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L5970AD Table 2. Thermal Data Symbol R Thermal Resistance Junction to ambient th (j-amb) (*) Package mounted on board Figure 3. Pin Connection (top view) Table 3. Pin Description N. Name 1 OUT Regulator Output. 2 SYNC Master/Slave Synchronization. When ...
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Table 5. Electrical Characteristics (T Symbol Parameter V Operating input voltage range CC R Mosfet on Resistance DSON I Maximum limiting current l f Switching frequency s Duty cycle DYNAMIC CHARACTERISTICS V Voltage feedback 5 η Efficiency DC CHARACTERISTICS I ...
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L5970AD 3 Functional Description The main internal blocks are shown in Fig. 4, where is reported the device block diagram. They are: ● A voltage regulator that supplies the internal circuitry. From this regulator, a 3.3V reference voltage is externally ...
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Figure 5. Internal Regulator Circuit STARTER D00IN1126 3.3 OSCILLATOR & SYNCHRONIZATOR Figure 6 shows the block diagram of the oscillator circuit. The Clock Generator provides the switching frequency of the device that is internally fixed at 500KHz. The frequency shifter ...
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L5970AD 3.4 CURRENT PROTECTION The L5970AD has two current limit protections, pulse by pulse and frequency fold back. The schematic of the current limitation circuitry for the pulse by pulse protection is shown in figure 7. The output power PDMOS ...
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The turn on of the power element, or better, the rise time of the current at turn on very critical param- eter to compromise first approach, it looks like the faster it is the rise time, ...
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L5970AD 3.8 THERMAL SHUTDOWN The shutdown block generates a signal that turns off the power stage if the temperature of the chip goes higher than a fixed internal threshold (150°C). The sensing element of the chip is very close to ...
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Package Information Figure 9. SO-8 Mechanical Data & Package Dimensions mm DIM. MIN. TYP. MAX. A 1.35 1.75 A1 0.10 0.25 A2 1.10 1.65 B 0.33 0.51 C 0.19 0.25 (1) 4.80 5. 3.80 4.00 e 1.27 ...
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L5970AD 7 REVISION HISTORY Table 6. Revision History Date Revision March 2005 10/11 1 Initial load. Description of Changes ...
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... No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics ...