Cypress MicroSystems CY8C25122/CY8C26233/CY8C26443/CY8C26643 Family Data Sheet
132
Document #: 38-12010 CY Rev. ** CMS Rev. 3.20
September 5, 2002
13.2.5
Switch Mode Pump Specifications
Table 110:
DC Switch Mode Pump Specifications
Symbol
DC Switch Mode Pump Specifications
Minimum
Typical
Maximum
Unit
Output Voltage1
1.
Average, neglecting ripple.
3.07
-
5.15
V
Available Output Current
Vi = 1.5 V, Vo = 3.25 V
Vi = 1.5 V, Vo = 5.0 V
82
5
2.
For implementation, which includes 2 µH inductor, 1 µF capacitor, and Schottkey diode. Performance is signifi-
cantly a function of external components. Specifications guaranteed for inductors with series resistance less than
0.1 W, with a current rating of > 250 mA, a capacitor with less than 1µA leakage at 5V, and Schottkey diode with
less than 0.6V of drop at 50 mA.
-
-
-
-
mA
mA
Short Circuit Current (Vi = 3.3 V)
-
12
-
mA
Input Voltage Range (During sustained operation)
1.0
-
3.3
V
Minimum Input Voltage to Start Pump
1.1
1.2
-
Output Voltage Tolerance (Over Vi Range)
-
5
-
%Vo
Line Regulation (Over Vi Range)
-
5
-
%Vo
Load Regulation
-
5
-
%Vo
Output Voltage Ripple (Depends on capacitor and load)
-
253
3.
Configuration of note 2. Load is 5 mA.
-
mVpp
Transient Response
50% Load Change to 5% error envelope
Vo Over/Undershoot for 50% Load Change
-
-
1
1
-
-
µs
%Vo
Efficiency
354
4.
Configuration of note 2. Load is 5 mA. Vout is 3.25V.
50
-
%
Switching Frequency
-
1.3
-
MHz
Switching Duty Cycle
-
50
-
%
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