AME5252 Datasheet, PDF (5/18 Pages) Analog Microelectronics – Dual Synchronous, 600mA, 1.5MHz Step-Down DC/DC Converter

AME
AME5252
Dual Synchronous, 600mA, 1.5MHz
Step-Down DC/DC Converter
n Pin Configuration
DFN-10B
(3mmx3mmx0.75mm)
Top View
10 9 8 7 6
AME5252
1 23 4 5
AME5252-AVBxxx
1. VFB1 7. SW2
2. EN1 8. PORB
3. IN
9. EN2
4. SW1 10. VFB2
5. GND 11. *PGND
6. SYNC
Die Attach:
Conductive Epoxy
Note:
* The area enclosed by dashed line represents Exposed Pad (Pin11) and must be connected to GND.
n Pin Description
Pin Number Pin Name
1
VFB1
2
EN1
3
IN
4
SW1
5
GND
6
SYNC
7
SW2
8
PORB
9
10
11
Rev.C.01
EN2
VFB2
PGND
Pin Description
Regulator 1 Output Feedback. Receives the feedback voltage from the external
resistive divider across the output. Nominal voltage for this pin is 0.6V.
Regulator 1 Enable. Forcing this pin to V_IN enables regulator 1, while forcing it
to GND caused regulator 1 to shutdown.
C
Main Power Supply. Must be closely decoupled to GND.
Regulator 1 Switch Node Connection to the Inductor. This pin swings from V_IN
to GND.
Main Ground. Connect to the (-) terminal of C_OUT, and (-) terminal of C_IN.
The oscillation frequency can be syncronized to an external oscillator applied
to this pin and pulse skipping mode is automatically selected. Do not float this
pin.
Regulator 2 Switch Node Connection to the Inductor. This pin swings from VIN
to GND.
Power-on Reset. This common-drain logic output is pulled to GND when the
output voltage is not within 8.5% of regulation and goes high after 175ms when
both channels are within regulation.
Requlator 2 Enable. Output Feedback. Forcing this pin to VIN enables regulator
2, while forcing it to GND causes regulator 2 to shut down.
Regulator 2 Output Feedback Reveives the feedback voltage from the external
resistive divider across the output Nominal voltage for this pin is 0.6V.
Must be Connected to GND.
5