34701_07 Datasheet, PDF (13/38 Pages) Freescale Semiconductor, Inc – 1.5 A Switch-Mode Power Supply with Linear Regulator

ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 4. DYNAMIC ELECTRICAL CHARACTERISTICS (continued)
Characteristics noted under conditions -40°C ≤ T_A ≤ 85°C unless otherwise noted. Input voltages VIN1 = VIN2 = 3.3 V using
the typical application circuit (see Figures 33) unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
BOOST REGULATOR
Boost Regulator MOSFET Maximum ON Time ⁽²¹⁾
Boost Regulator Control Loop Propagation Delay ⁽²¹⁾
Boost Switching Node VBD Rise Time ⁽²¹⁾
IBST = 20 mA
Boost Switching Node VBD Fall Time ⁽²¹⁾
IBST = 20 mA
LINEAR REGULATOR (LDO)
t_ON
–
24
–
µs
t_{BST_PD}
–
50
–
ns
t_{B_RISE}
ns
–
5.0
t_{B_FALL}
ns
–
3.0
–
Fault Condition Time-Out
Retry Timer Cycle
RESET MONITOR (RST)
t_FAULT
7.0
10
15
ms
t_Ret
70
100
150
ms
Monitoring LFB Pin Delay
Monitoring INV Pin Delay
SCA, SCL PIN, I²C BUS (STANDARD)
t_{D_RST_LFB}
12
–
28
µs
t_{D_RST_INV}
12
–
28
µs
SCL Clock Frequency ⁽²¹⁾
f_SCL
–
–
100
kHz
Bus Free Time Between a STOP and a START Condition ⁽²¹⁾
t_BUF
4.7
–
–
µs
Hold Time (Repeated) START Condition (After this period, the first clock
t_HD-STA
pulse is generated.) ⁽²¹⁾
4.0
–
µs
–
Low Period of the SCL Clock ⁽²¹⁾
t_LOW
4.7
–
–
µs
High Period of the SCL Clock ⁽²¹⁾
t_HIGH
4.0
–
–
µs
SDA Fall Time from VIH_MAX to VIL_MIN, Bus Capacitance 10 pF to 400
t_F
pF, 3.0 mA Sink Current ^{(21), (23)}
ns
–
–
250
Setup Time for a Repeated START Condition ⁽²¹⁾
t_SU-STA
4.7
–
–
µs
Data Hold Time for I²C Bus Devices ⁽²¹⁾, ⁽²²⁾
t_HD-DAT
0.0
–
–
µs
Data Setup Time ⁽²¹⁾
t_SU-DAT
250
–
–
ns
Setup Time for STOP Condition ⁽²¹⁾
t_SU-STO
4.0
–
–
µs
Capacitive Load for Each Bus Line ⁽²¹⁾
C_B
–
–
400
pF
Notes
21. Design information only. This parameter is not production tested.
22. The device provides an internal hold time of at least 300 ns for the SDA signal (refer to the VIH_MIN of the SCL signal) to bridge the
undefined region of the falling edge of SCL.
23. VIH is High Level Voltage on I²C bus lines and VIL is Low Level Voltage on I²C bus lines
Analog Integrated Circuit Device Data
Freescale Semiconductor
34701
13