TS3300 Datasheet, PDF (9/14 Pages) Touchstone Semiconductor Inc – 0.6-4.5VIN, 1.8-5.25VOUT, 3.5-uA, Low Input Voltage, High-Efficiency Boost + LDO

TS3300
PIN FUNCTIONS
PIN
NAME
1
BIN
2
CCP
3
B^{തതത}E^തതN^ത
4
BI FB
5
FAC
6
SW EN
7
REG EN
8
REG FB
9
GND
10
REGOUT
11
REGIN
12
GND
13
BO FB
14
BO
15
LSW
16
GND
EP
െ
FUNCTION
Boost Input. Bypass this pin with a 22µF ceramic capacitor in close
proximity to the TS3300.
Charge Pump Capacitor. Place a 3.3nF capacitor between this pin and
GND
Boost Enable (active low). To enable the TS3300, connect this to GND. To
disable the TS3300, set the voltage to greater than V_BI – 50mV.
Boost Input Feedback for Anti-Crush Voltage Setting. The BI FB pin
voltage is 392mV. To set the anti-crush voltage, refer to the Applications
Information section and to Figure 7.
Factory use only. Do not connect to GND or VDD. Leave open.
Switch Enable. When SW EN is high and REG EN is low, the internal
FET/SWITCH connects the LDO output to the LDO input. The internal FET
has an Rds_ON = 1.2Ω. Refer to Table 1.
LDO Regulator Enable. When REG EN is high and SW EN is low, the
LDO is under normal operation. Refer to Table 1.
LDO Regulator Output Feedback. The REG FB pin voltage is 505mV.
REG FB coupled with a voltage divider circuit sets the LDO output voltage.
Refer to Figure 3.
Ground. Connect this pin to the analog ground plane
LDO Regulator Output Voltage. A minimum output capacitance of 10µF is
recommended to be placed from this pin to GND. To set the LDO output
voltage, use a voltage divider circuit along with the REG FB pin as shown
in Figure 3.
LDO Regulator Input/Boost Output. REGIN should always be connected to
the boost regulator output voltage pin BO. BO is always the input to the
LDO. Do not apply an external supply voltage to this pin.
Ground. Connect this pin to the analog ground plane.
Boost Output Feedback. The BO FB pin voltage is 505mV. BO FB coupled
with a voltage divider circuit sets the boost regulator output voltage. Refer
to Figure 2.
Boost Regulator Output Voltage. A minimum output capacitance of 10µF
is recommended to be placed from this pin to GND. To set the boost
regulator output voltage, use a voltage divider circuit along with the BO FB
pin. Refer to Figure 2.
Coil is a low-ESR, high-saturation current, shielded inductor. A 10µH
inductor is recommended for most applications and is to be placed from
this pin to the input of the boost regulator BI. Furthermore, there should
exist at least an 8% margin between the saturation current of the inductor
and the peak inductor current for a given set of operating conditions.
Ground. Connect this pin to the analog ground plane.
For best electrical and thermal performance, connect exposed paddle to
GND.
TS3300DS r1p0
Page 9
RTFDS