AOZ1117 Datasheet, PDF (1/8 Pages) Alpha & Omega Semiconductors – 1A Low Dropout Linear Regulator

AOZ1117
1A Low Dropout Linear Regulator
General Description
The AOZ1117 is a low dropout positive adjustable or
fixed-mode regulator with minimum of 1A output current
capability. The product is specifically designed to provide
well-regulated supply for low voltage IC applications such
as high-speed bus termination and low current 3.3V logic
supply. The AOZ1117 is also well suited for other appli-
cations such as VGA cards. The AOZ1117 is guaranteed
to have lower than 1.4V dropout at full load current mak-
ing it ideal to provide well-regulated outputs of 1.25V to
5.0V with 2.75V to 14V input supply.
Features
● 1.4V maximum dropout at full load current
● Fast transient response
● Output current limiting
● Built-in thermal shutdown
● Good noise rejection
● 3-terminal adjustable or fixed 1.5V, 1.8V, 2.5V, 3.3V,
or 5.0V
● TO252 package
Applications
● PC peripheral
● Communication
Typical Circuits
Fixed O^Fiu^xetp^du^Ot^uE^tpx^ua^tm^Ep^xl^ae^mple
V_IN + 5V^{VIN + 5V}
V_OUT^VO=^U3^T.3⁼V^3.3V
3
3 _{CV1 IN}
V_INVOUT V_2OUT
2
C1 ^10μF
ADJ/GND ¹
10μF
ADJ_A/G_ON_ZD₁₁₁¹₇
AOZ1117
C2
C2 ^10μF
10μF
A^Ad^dj^ju^us^st^ta^ab^bll^ee ^OO^uu^tt^pp^uu^t t^EE^xax^mam^plp^ele
V_IN^VIN+ ⁺5V^5V
V_OVUOTU=_T3₌.3₃V_.3V
3
3
V^V_IN^IN
V^VO_O^U_U^T_T
2
2
C1
ADJ/GND
ADJ/GND
1
1
C¹1^{0μF AOZ1117}
10μF ^AOZ1117
R1
24R01Ω
240Ω
R2
39_R0₂Ω
390Ω
C2
10μ_CF₂
10μF
!
V_OUT = V_REF x
1+
R2
R1
V^V_OR_UE_TF ⁼= ¹V^.2_R⁵_E⁰_F^Vx
1+
R2
R1
V_REF = 1.250V
Figure 1.
Rev. 1.1 September 2008
www.aosmd.com
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