Specifications
CY8C21123/CY8C21223/CY8C21323
Document Number: 38-12022 Rev. *Y Page 20 of 46
DC Switch Mode Pump Specifications
Table 18 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
apply to 5 V, 3.3 V, or 2.7 V at 25 °C and are for design guidance only.
Table 18. 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 Configuration of footnote.
[6]
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 Configuration of footnote.
[6]
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 Configuration of footnote.
[6]
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
Configuration of footnote.
[6]
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 Configuration of footnote.
[6]
SMP trip
voltage is set to 5.0 V.
V
BAT3V
Input voltage range from battery 1.0 – 3.3 V Configuration of footnote.
[6]
SMP trip
voltage is set to 3.25 V.
V
BAT2V
Input voltage range from battery 1.0 – 2.8 V Configuration of footnote.
[6]
SMP trip
voltage is set to 2.55 V.
V
BATSTART
Minimum input voltage from battery to start
pump
1.2 – – V Configuration of footnote.
[6]
0 °C T
A
100. 1.25 V at T
A
= –40
°C.
V
PUMP_Line
Line regulation (over Vi range) – 5 – %V
O
Configuration of footnote.
[6]
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 19 on page 21.
V
PUMP_Load
Load regulation – 5 – %V
O
Configuration of footnote.
[6]
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 19 on page 21.
V
PUMP_Ripple
Output voltage ripple (depends on cap/load) – 100 – mVpp Configuration of footnote.
[6]
Load is
5 mA.
E
3
Efficiency 35 50 – % Configuration of footnote.
[6]
Load is
5 mA. SMP trip voltage is set to 3.25 V.
E
2
Efficiency 35 80 – % For I load = 1 mA, V
PUMP
= 2.55 V,
V
BAT
= 1.3 V, 10 uH inductor, 1 uF
capacitor, and Schottky diode.
F
PUMP
Switching frequency – 1.3 – MHz
DC
PUMP
Switching duty cycle – 50 – %
Note
6. L
1
= 2 mH inductor, C
1
= 10 mF capacitor, D
1
= Schottky diode. Refer to Figure 12 on page 21.