A5970AD ,Up to 1 A step down switching regulator for automotive applicationsfeatures and protection . . . . 156.1 Feedback disconnection . . . . . . 156.2 Output overv ..
A5970ADTR ,Up to 1 A step down switching regulator for automotive applicationsapplications Voltage feed-forwardrequiring the device operation even in cold crank conditions. Pu ..
A5970D ,Up to 1 A step down switching regulator for automotive applicationsfeatures and protection . . . . 156.1 Feedback disconnection . . . . . . 156.2 Output overv ..
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 ..
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
A5970AD-A5970ADTR
Up to 1 A step down switching regulator for automotive applications
March 2014 DocID14661 Rev 5 1/42
A5970ADUp to 1 A step down-switching regulator for automotive applications
Datasheet - production data
Features Qualified following the AEC-Q100
requirements (see PPAP for more details) 1 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 500 kHz Internally fixed frequency Voltage feed-forward Zero load current operation Internal current limiting Inhibit for zero current consumption Synchronization Protection against feedback disconnection Thermal shutdown
Application Dedicated to automotive applications
DescriptionThe A5970AD is a step-down monolithic power
switching regulator with a minimum switch current
limit of 1.35 A so it is able to deliver up to 1 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
switching element to minimize the size of the
external components.
An internal oscillator fixes the switching frequency
at 500 kHz. Having a minimum input voltage of
4 V only it fits the automotive applications
requiring the device operation even in cold crank
conditions. Pulse by pulse current limit with the
internal frequency modulation offers an effective
constant current short-circuit protection.
Figure 1. Application schematic
Contents A5970AD2/42 DocID14661 Rev 5
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 . . . . . . . . . . . . . . . . 8 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95.1 Power supply and voltage reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.2 Voltages monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.3 Oscillator and synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.4 Current protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
5.5 Error amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.6 PWM comparator and power stage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5.7 Inhibit function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.8 Thermal shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Additional features and protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156.1 Feedback disconnection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2 Output overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.3 Zero load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Closing the loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 167.1 Error amplifier and compensation network . . . . . . . . . . . . . . . . . . . . . . . . 17
7.2 LC filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.3 PWM comparator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
DocID14661 Rev 5 3/42
A5970AD Contents Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 218.1 Component selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.2 Layout considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.3 Thermal considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.4 Short-circuit protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
8.5 Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
8.6 Positive buck-boost regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
8.7 Negative buck-boost regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
8.8 Synchronization example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
8.9 Compensation network with MLCC at the output . . . . . . . . . . . . . . . . . . . 34
8.10 External SOFT_START network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Pin settings A5970AD
4/42 DocID14661 Rev 5
1 Pin settings
1.1 Pin connection
1.2 Pin description
Table 1. Pin description
DocID14661 Rev 5 5/42
A5970AD 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.
