A5972D ,Up to 1.5 A step down switching regulator for automotive applicationsfeatures and protection . . . . 126.1 Feedback disconnection . . . . . . 126.2 Output overv ..
A5972D013TR ,Up to 1.5 A step down switching regulator for automotive applicationsFeatures limit of 1.8 A so it is able to deliver up to 1.5 A DC current to the load depending on th ..
A5973AD ,Up to 1.5 A step down switching regulator for automotive applicationsfeatures and protection . . . . 156.1 Feedback disconnection . . . . . . 156.2 Output overv ..
A5973ADTR ,Up to 1.5 A step down switching regulator for automotive applicationsFeatures limit of 1.8 A, so it is able to deliver up to 1.5 A DC Qualified following the AEC-Q100 ..
A5973D ,Up to 2 A step down switching regulator for automotive applicationsfeatures and protection . . . . 156.1 Feedback disconnection . . . . . . 156.2 Output overv ..
A5973D013TR ,Up to 2 A step down switching regulator for automotive applicationsFeatures limit of 2.25 A so it is able to deliver up to 2 A DC current to the load depending on the ..
AD45048AR ,Rail-to-Rail, High Output Current, Upstream ADSL Line DriverSPECIFICATIONS °VS = ±6 V or 12 V (@ TA = 25 C, G = +10, RL = 100 Ω, unless otherwise noted). Table ..
AD45048ARZ ,Rail-to-Rail Upstream ADSL Line DriverSPECIFICATIONS °VS = ±6 V or +12 V (@ TA = 25 C, G = +10, RL = 100 Ω, unless otherwise noted). Tabl ..
AD45048ARZ-REEL ,Rail-to-Rail Upstream ADSL Line Driverapplications. Fabricated with ADI’s high speed XFCB-HV (eXtra Fast Complementary Bipolar-High Volt ..
AD45048ARZ-REEL7 ,Rail-to-Rail Upstream ADSL Line DriverFEATURES PIN CONFIGURATION Dual op amp OUT1 1 8 +VSVoltage feedback –IN1 2 7 OUT2Wide supply range: ..
AD484M1644VTA-6 , Ascend Semiconductor Corporation(64Mb SDRAM)
AD4-C211 , Dual 1 Form A Solid State Relay
A5972D-A5972D013TR
Up to 1.5 A step down switching regulator for automotive applications
April 2014 DocID13956 Rev 6 1/37
A5972DUp to 1.5 A step-down switching regulator for automotive
applications
Datasheet - production data
Features Qualified following the AEC-Q100
requirements (see PPAP for more details) 1.5 A DC output current Operating input voltage from 4 V to 36 V 3.3 V / (± 2%) reference voltage Output voltage adjustable from 1.235 V to VIN Low dropout operation: 100% duty cycle 250 kHz internally fixed frequency Voltage feed-forward Zero load current operation Internal current limiting Inhibit for zero current consumption Protection against feedback disconnection Thermal shutdown
Application Dedicated to automotive applications
DescriptionThe A5972D is a step-down monolithic power
switching regulator with a minimum switch current
limit of 1.8 A so it is able to deliver up to 1.5 A DC
current to the load depending on the application
conditions. The output voltage can be set from
1.235 V to VIN.
The device uses an internal P-channel DMOS
transistor (with a typical RDS(on) of 250 m) as
a switching element to minimize the size of the
external components.
An internal oscillator fixes the switching frequency
at 250 kHz. Having a minimum input voltage of
4 V only it fits the automotive applications
requiring the device operation even in cold crank
conditions. A pulse-by-pulse current limit with the
internal frequency modulation offers an effective
constant current short-circuit protection.
Figure 1. Application schematic
Contents A5972D2/37 DocID13956 Rev 6
Contents Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52.1 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Datasheet parameters over the temperature range . . . . . . . . . . . . . . . . 7 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85.1 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5.2 Voltages monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.3 Current protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.4 Error amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.5 PWM comparator and power stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.6 Thermal shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Additional features and protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126.1 Feedback disconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.2 Output overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6.3 Zero load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Closing the loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137.1 Error amplifier and compensation network . . . . . . . . . . . . . . . . . . . . . . . . 14
7.2 LC filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.3 PWM comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
DocID13956 Rev 6 3/37
A5972D Contents Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188.1 Component selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8.2 Layout considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8.3 Thermal considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.4 Short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8.5 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8.6 Positive buck-boost regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
8.7 Negative buck-boost regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.8 Compensation network with MLCC at the output . . . . . . . . . . . . . . . . . . . 30
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Pin settings A5972D
4/37 DocID13956 Rev 6
1 Pin settings
1.1 Pin connection
1.2 Pin description
Table 1. Pin description
DocID13956 Rev 6 5/37
A5972D Electrical data
2 Electrical data
2.1 Maximum ratings
2.2 Thermal data
Table 2. Absolute maximum ratings
Table 3. Thermal data Package mounted on evaluation board.
