ISL78214 Datasheet, PDF (2/15 Pages) Intersil Corporation – 4A Low Quiescent Current High Efficiency Synchronous Buck Regulator

ISL78214
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL78214ARZ
782 14ARZ
-40 to +105
16 Ld 4x4 QFN
L16.4x4
NOTES:
1. Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both
SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL78214. For more information on MSL please
see techbrief TB363.
Pin Configuration
ISL78214
(16 LD QFN)
TOP VIEW
16 15 14 13
VIN 1
VIN 2
VDD 3
SYNCH 4
12 PGND
11 PGND
PD
10 SGND
9 SGND
5 678
Refer to Application Note AN1366 for more layout suggestions.
Pin Descriptions
PIN NUMBER
1, 2
3
5
7
4
14, 15
11, 12
9, 10
8
6, 13, 16
PD
PIN NAME
VIN
VDD
EN
PG
SYNCH
LX
PGND
SGND
VFB
NC
Exposed Pad
DESCRIPTION
Input supply voltage. Connect a 10µF ceramic capacitor to power ground.
Input supply voltage for the analog circuitry. Connect to VIN pin.
Regulator enable pin. Enable the output when driven to high. Shut down the chip and
discharge output capacitor when driven to low. Do not leave this pin floating.
1ms timer output. At power-up or EN HI, this output is a 1ms delayed Power-Good signal
for the output voltage.
Mode Selection pin. Connect to logic high or input voltage VDD for PWM mode. Connect
to logic low or ground for PFM mode. Connect to an external function generator for
synchronization with the negative edge trigger. Do not leave this pin floating.
Switching node connection. Connect to one terminal of the inductor.
Power ground
Signal ground.
Buck regulator output feedback. Connect to the output through a resistor divider for
adjustable output voltage. For 0.8V output voltage, connect this pin to the output.
No connect.
The exposed pad must be connected to the SGND pin for proper electrical performance.
Place as much vias as possible under the pad connecting to SGND plane for optimal
thermal performance.
2
FN7551.0
March 8, 2010