Datasheet

CY8C21x34B
Document Number: 001-67345 Rev. *E Page 23 of 49
DC Switch Mode Pump Specifications
Tab le 16 lists the guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75 V to 5.25 V and
–40 °C  T
A
 85 C, 3.0 V to 3.6 V and –40 °C  T
A
 85 °C, or 2.4 V to 3.0 V and –40 °C  T
A
 85 °C, respectively. Typical parameters
are measured at 5 V, 3.3 V, or 2.7 V at 25 °C and are for design guidance only.
Figure 12. Basic Switch Mode Pump Circuit
Battery
C1
D1
+
PSoC
Vdd
Vss
SMP
V
BAT
L
1
V
PUMP
Table 16. DC Switch Mode Pump (SMP) Specifications
Symbol Description Min Typ Max Units Notes
V
PUMP5V
5 V output voltage from pump 4.75 5.0 5.25 V Configured as in Note 9
Average, neglecting ripple
SMP trip voltage is set to 5.0 V
V
PUMP3V
3.3 V output voltage from pump 3.00 3.25 3.60 V Configured as in Note 9
Average, neglecting ripple.
SMP trip voltage is set to 3.25 V
V
PUMP2V
2.6 V output voltage from pump 2.45 2.55 2.80 V Configured as in Note 9
Average, neglecting ripple.
SMP trip voltage is set to 2.55 V
I
PUMP
Available output current
V
BAT
= 1.8 V, V
PUMP
= 5.0 V
V
BAT
= 1.5 V, V
PUMP
= 3.25 V
V
BAT
= 1.3 V, V
PUMP
= 2.55 V
5
8
8
–
–
–
–
–
–
mA
mA
mA
Configured as in Note 9
SMP trip voltage is set to 5.0 V
SMP trip voltage is set to 3.25 V
SMP trip voltage is set to 2.55 V
V
BAT5V
Input voltage range from battery 1.8 – 5.0 V Configured as in Note 9
SMP trip voltage is set to 5.0 V
V
BAT3V
Input voltage range from battery 1.0 – 3.3 V Configured as in Note 9
SMP trip voltage is set to 3.25 V
V
BAT2V
Input voltage range from battery 1.0 – 2.8 V Configured as in Note 9
SMP trip voltage is set to 2.55 V
V
BATSTART
Minimum input voltage from battery
to start pump
1.2 – – V Configured as in Note 9
0 C  T
A
 100. 1.25 V at T
A
= –40 °C
V
PUMP_Line
Line regulation (over Vi range) – 5 – %V
O
Configured as in Note 9
V
O
is the “V
DD
Value for PUMP Trip” specified
by the VM[2:0] setting in the DC POR and LVD
Specification, Table 18 on page 24
V
PUMP_Load
Load regulation – 5 – %V
O
Configured as in Note 9
V
O
is the “V
DD
Value for PUMP Trip” specified
by the VM[2:0] setting in the DC POR and LVD
Specification, Table 18 on page 24
V
PUMP_Ripple
Output voltage ripple (depends on
cap/load)
– 100 – mVpp Configured as in Note 9
Load is 5 mA
E
3
Efficiency 35 50 – % Configured as in Note 9
Load is 5 mA. SMP trip voltage is set to 3.25 V
Note
9. L
1
= 2 mH inductor, C
1
= 10 mF capacitor, D
1
= Schottky diode. See Figure 12.