MB39A214APFT-G-JNERE1 Datasheet, PDF (3/56 Pages) Fujitsu Component Limited. – 2ch DC/DC converter IC with PFM/ PWM synchronous rectification

MB39A214A
„ PIN DESCRIPTIONS
Pin No. Pin Name I/O
1
BST1
—
2
EN1
I
3
VOUT1
I
4
FB1
I
5
CS1
I
6
GND
—
7
FREQ
I
8
CS2
I
9
FB2
I
10
VOUT2
I
11
EN2
I
12
BST2
—
13
DRVH2
O
14
LX2
—
15
DRVL2
—
16
ILIM2
I
17
MODE
I
18
VB
O
19
VCC
I
20
ILIM1
I
21
PGND
—
22
DRVL1
O
23
LX1
—
24
DRVH1
O
Description
CH1 boost capacitor connection pin.
CH1 enable pin.
CH1 input pin for DC/DC output voltage.
CH1 input pin for feedback voltage.
CH1 soft-start time setting capacitor connection pin.
Ground pin.
Frequency switching signal input pin.
FREQ : GND Short Switching frequency
FREQ : Open
Switching frequency
FREQ : VB Short Switching frequency
310 kHz
620 kHz
1 MHz
CH2 soft-start time setting capacitor connection pin.
CH2 input pin for feedback voltage.
CH2 input pin for DC/DC output voltage.
CH2 enable pin.
CH2 boost capacitor connection pin.
CH2 output pin for external high-side FET gate drive.
CH2 inductor and external high-side FET source connection pin.
CH2 output pin for external low-side FET gate drive.
CH2 over current detection level setting voltage input pin.
DC/DC control mode switching signal input pin.
MODE : GND Short PFM/PWM
MODE : Open
PFM/PWM, PAF
MODE : VB Short
PWM fixed
Internal circuit bias output pin.
Power input pin for control and output circuits.
CH1 over current detection level setting voltage input pin.
Ground pin for output circuit.
CH1 output pin for external low-side FET gate drive.
CH1 inductor and external high-side FET source connection pin.
CH1 output pin for external high-side FET gate drive.
DS405-00007-1v0-E
3