L4970A STMicroelectronics, L4970A Datasheet
L4970A
Specifications of L4970A
Available stocks
Related parts for L4970A
L4970A Summary of contents
Page 1
... Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. Features of the L4970A include reset and power fail for mi- croprocessors, feed forward line regulation, soft start, limiting current and thermal protection. The ...
Page 2
... L4970A ABSOLUTE MAXIMUM RATINGS Symbol V Input Voltage 9 V Input Operating Voltage 9 V Output DC Voltage 7 Output Peak Voltage 0 200KHz I Maximum Output Current 7 V Bootstrap Voltage 6 Bootstrap Operating Voltage Input Voltage at Pins Reset Output Voltage 4 I Reset Output Sink Current Input Voltage at Pin 5, 10, 11, 13 ...
Page 3
... L4970A ELECTRICAL CHARACTERISTICS (Refer to the test circuit 2.2nF 200KHz typ, unless otherwise specified DYNAMIC CHARACTERISTICS Symbol Parameter V input Voltage Range (pin Output Votage o V Line Regulation o V Load Regulation o V Dropout Voltage Between d Pin 9 and 7 I Max. Limiting Current 7L Efficiency SVR Supply Voltage Ripple Reject ...
Page 4
... Test Condition Min 1 15V 45V 100 1mA 2.4 Test Condition Min 15V to 50V –0 3 0.9V 3.5V 2.5V 0.3 thr L4970A Typ. Max. Unit Fig Typ. Max. Unit Fig. 100 130 0 Typ. Max. Unit Fig 1 150 A 7C 150 – ...
Page 5
... L4970A ELECTRICAL CHARACTERISTICS (continued) RESET AND POWER FAIL FUNCTIONS Symbol Parameter V Rising Threshold Voltage 11R (pin 11) V Falling Threshold Voltage 11F (pin 11) V Delay High Threshold 5H Voltage V Delay Low Threshold 5L Voltage –I Delay Source Current 5SO I Delay Sink Current 5SI V Out Saturation Voltage ...
Page 6
... L4970A mm DIM. MIN. TYP. MAX 2. 0.49 0.55 0.019 F 0.66 0.75 0.026 G 1.02 1.27 1.52 0.040 G1 17.53 17.78 18.03 0.690 H1 19.6 0.772 H2 20.2 L 21.9 22.2 22.5 0.862 L1 21.7 22.1 22.5 0.854 L2 17.65 18.1 0.695 L3 17.25 17.5 17.75 0.679 L4 10.3 10.7 10 ...