aoz1605 Alpha & Omega Semiconductor, aoz1605 Datasheet - Page 4

• Manufacturer Part Number: aoz1605
• Description: 500 Ma / 3 Mhz Ezbuck Regulator
• Manufacturer: Alpha & Omega Semiconductor

Electrical Characteristics
T
-40 °C to +85 °C.
Output Voltage Selection for AOZ1605
The output voltage of the AOZ1605 ca be programmed
through the resistor network connected from Vout to
Feedback to Analog Ground. The resistor from FB to
Analog Ground should be 100 kΩ to keep the current
drawn through this network below the 6 μA quiencent
current level in PFM mode. The output voltage of the
adjustable AOZ1605 parts ranges from 0.6 V to 3.3 V.
The output voltage formula is:
where;
V
V
R1 = Feedback Resistor from Vout to FB (Ω)
R2 = Feedback Resistor from FB to AGND (Ω)
A 100 pF bypass capacitor C5 on the evaluation board,
in parallel with the feedback resistor from Vout to FB is
chosen for increased stability throughout the voltage
range.
V
A
OUTPUT STAGE
OUT
FB
R
R
Symbol
Rev. 1.0 March 2011
OUT
= 25 °C, V
DS(ON)P
DS(ON)N
= Feedback Voltage (0.6 V typical)
= Output Voltage (V)
=
V
IN
FB
PFET On Resistance
NFET On Resistance
LX Leakage Current
Efficiency
= 3.6 V, EN = IN, unless otherwise specified. Specifications in BOLD indicate a temperature range of
⎛
⎝
R1
------- -
R2
+
Parameter
1
⎞
⎠
(Continued)
I
I
V
V
LX
LX
EN
IN
= 50 mA sourcing
= 50 mA sinking
= 3.6 V, V
= 0 V, V
www.aosmd.com
LX
OUT
Conditions
= 0 V or V
Table 1. Output Voltage Resistor Selection Table for
Various Vout Voltages
= 1.8 V, 200 mA load
1.875
Vout
(V)
0.6
1.1
1.2
1.3
1.5
1.6
1.7
1.8
2.5
2.8
3.3
IN
, V
(kΩ)
100
117
150
167
183
200
213
317
367
450
R1
83
IN
0
= 5 V
(kΩ)
100
100
100
100
100
100
100
100
100
100
100
100
R2
Min.
(μH)
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
L
Typ.
400
250
90
(μF)
Cin
10
10
10
10
10
10
10
10
10
10
10
10
Max
Cout
(μF)
1
AOZ1605
10
10
10
10
10
10
10
10
10
10
10
10
Page 4 of 15
Units
(pF)
100
100
100
100
100
100
100
100
100
100
100
100
μA
C5
%
Ω
Ω