CY8C24x23A Final Data Sheet
3. Electrical Specifications
3.3.5
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 ≤ TA ≤ 85°C, 3.0V to 3.6V and -40°C ≤ TA ≤ 85°C, or 2.4V to 3.0V and -40°C ≤ TA ≤ 85°C, respectively. Typical parameters
apply to 5V, 3.3V, and 2.7V at 25°C and are for design guidance only.
Table 3-13. DC Switch Mode Pump (SMP) Specifications
Symbol
Description
Min
4.75
Typ
5.0
Max
5.25
Units
Notes
Configuration of footnote a. Average, neglecting
ripple. SMP trip voltage is set to 5.0V.
VPUMP 5V
5V Output Voltage from Pump
V
V
V
Configuration of footnote a. Average, neglecting
ripple. SMP trip voltage is set to 3.25V.
VPUMP 3V
VPUMP 2V
IPUMP
3.3V Output Voltage from Pump
2.6V Output Voltage from Pump
Available Output Current
3.00
2.45
3.25
2.55
3.60
2.80
Configuration of footnote a. Average, neglecting
ripple. SMP trip voltage is set to 2.55V.
Configuration of footnote a
.
V
V
V
BAT = 1.8V, VPUMP = 5.0V
BAT = 1.5V, VPUMP = 3.25V
BAT = 1.3V, VPUMP = 2.55V
5
8
8
–
–
–
–
–
–
mA
mA
mA
SMP trip voltage is set to 5.0V.
SMP trip voltage is set to 3.25V.
SMP trip voltage is set to 2.55V.
Configuration of footnote a. SMP trip voltage is
set to 5.0V.
V
BAT5V
Input Voltage Range from Battery
1.8
1.0
1.0
1.2
–
–
–
–
5.0
3.3
3.0
–
V
V
V
V
Configuration of footnote a. SMP trip voltage is
set to 3.25V.
VBAT3V
Input Voltage Range from Battery
Configuration of footnote a. SMP trip voltage is
set to 2.55V.
VBAT2V
Input Voltage Range from Battery
Configuration of footnote a. 0oC ≤ TA ≤ 100.
1.25V at TA = -40oC.
VBATSTART
Minimum Input Voltage from Battery to Start Pump
Configuration of footnote a. VO is the “Vdd
Value for PUMP Trip” specified by the VM[2:0]
setting in the DC POR and LVD Specification,
Table 3-18 on page 27.
∆VPUMP_Line
Line Regulation (over VBAT range)
Load Regulation
–
–
5
5
–
–
%VO
%VO
Configuration of footnote a. VO is the “Vdd
∆VPUMP_Load
Value for PUMP Trip” specified by the VM[2:0]
setting in the DC POR and LVD Specification,
Table 3-18 on page 27.
Configuration of footnote a. Load is 5 mA.
∆VPUMP_Ripple Output Voltage Ripple (depends on capacitor/load)
–
100
50
–
–
mVpp
%
Configuration of footnote a. Load is 5 mA. SMP
trip voltage is set to 3.25V.
E3
Efficiency
35
E2
Efficiency
FPUMP
DCPUMP
Switching Frequency
Switching Duty Cycle
–
–
1.3
50
–
–
MHz
%
a. L = 2 µH inductor, C = 10 µF capacitor, D = Schottky diode. See Figure 3-2.
1
1
1
D1
Vdd
VPUMP
L1
SMP
Vss
+
VBAT
TM
Battery
PSoC
C1
Figure 3-2. Basic Switch Mode Pump Circuit
September 8, 2004
Document No. 38-12028 Rev. *B
24
CYPRESS [ CYPRESS ]
