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CY8C24123
CY8C24223, CY8C24423
Document Number: 38-12011 Rev. *G Page 22 of 43
DC Switch Mode Pump Specifications
The following table lists guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75V to 5.25V
and -40°C ≤ T
A
≤ 85°C, or 3.0V to 3.6V and -40°C ≤ T
A
≤ 85°C, respectively. Typical parameters apply to 5V and 3.3V at 25°C and
are for design guidance only or unless otherwise specified.
Figure 11. Basic Switch Mode Pump Circuit
Table 19. DC Switch Mode Pump (SMP) Specifications
Symbol Description Min Typ Max Units Notes
V
PUMP
5V 5V Output voltage 4.75 5.0 5.25 V Average, neglecting ripple
V
PUMP
3V 3V Output voltage 3.00 3.25 3.60 V Average, neglecting ripple
I
PUMP
Available Output Current
V
BAT
= 1.5V, V
PUMP
= 3.25V
V
BAT
= 1.8V, V
PUMP
= 5.0V
8
5
–
–
–
–
mA
mA
For implementation, which
includes 2 uH inductor, 1 uF cap,
and Schottky diode
V
BAT
5V Input Voltage Range from Battery 1.8 – 5.0 V
V
BAT
3V Input Voltage Range from Battery 1.0 – 3.3 V
V
BATSTART
Minimum Input Voltage from Battery to
Start Pump
1.1 – – V
ΔV
PUMP_Line
Line Regulation (over V
BAT
range) – 5 – %V
O
a
a. V
O
is the “Vdd Value for PUMP Trip” specified by the VM[2:0] setting in the DC POR and LVD Specification, Table 23 on page 25.
ΔV
PUMP_Load
Load Regulation – 5 – %V
O
a
ΔV
PUMP_Ripple
Output Voltage Ripple (depends on
cap/load)
– 25 – mVpp Configuration of note 2, load is
5mA
– Efficiency 35 50 – % Configuration of note 2, load is
5mA, Vout is 3.25V.
F
PUMP
Switching Frequency – 1.3 – MHz
DC
PUMP
Switching Duty Cycle – 50 – %
Battery
C1
D1
+
PSoC
TM
Vdd
Vss
SMP
V
BAT
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