ISL78233 Datasheet, PDF (3/18 Pages) Intersil Corporation – 3A and 4A Compact Synchronous Buck Regulators

ISL78233, ISL78234
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
OUTPUT VOLTAGE
(V)
TEMP. RANGE
(°C)
PACKAGE
(RoHS Compliant)
PKG.
DWG. #
ISL78233ARZ
8233
ADJUSTABLE
-40 to +125 16 Ld 3x3 TQFN
L16.3x3D
ISL78234ARZ
8234
ADJUSTABLE
-40 to +125 16 Ld 3x3 TQFN
L16.3x3D
ISL78233EVAL1Z
Evaluation Board
ISL78234EVAL1Z
Evaluation Board
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 ISL78233, ISL78234 For more information on MSL please see techbrief
TB363.
Typical Application Diagram
L₁
1.0µH _C2
2 x 22µF
+1.8V/4A
V_OUT
V_IN
GND
+2.7V …+5.5V
C1
2 x 22µF
R1
100k 
1 _VIN
2 _VDD
ISL78233, ISL78234
PGND ¹²
PGND ¹¹
R₂
200k
C₃*
22pF
GND
PG
3 _PG
SGND ¹⁰
R₃
100k
4 _SYNC
FB ⁹
+0.6V
*C₃ IS OPTIONAL. IT IS
RECOMMENDED TO PUT A
PLACEHOLDER FOR IT AND CHECK
LOOP ANALYSIS BEFORE USE.
V_OUT
C1
C2
C3
L1
R2
R3
1.2V
2 x 22µF
2 x 22µF
22pF
0.47~1µH
100kΩ
100kΩ
FIGURE 2. TYPICAL APPLICATION DIAGRAM
TABLE 1. COMPONENT SELECTION TABLE
1.5V
1.8V
2.5V
2 x 22µF
2 x 22µF
2 x 22µF
2 x 22µF
2 x 22µF
2 x 22µF
22pF
22pF
22pF
0.47~1µH
0.68~1.5µH
0.68~1.5µH
150kΩ
200kΩ
316kΩ
100kΩ
100kΩ
100kΩ
3.3V
2 x 22µF
2 x 22µF
22pF
1~2.2µH
450kΩ
100kΩ
3.6V
2 x 22µF
2 x 22µF
22pF
1~2.2µH
500kΩ
100kΩ
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3
FN8359.5
April 23, 2015