34701_07 Datasheet, PDF (9/38 Pages) Freescale Semiconductor, Inc – 1.5 A Switch-Mode Power Supply with Linear Regulator

ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 3. Static 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 Figure 33) unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
ERROR AMPLIFIER (BUCK CONVERTER)
Input Impedance ⁽¹¹⁾
Output Impedance ⁽¹¹⁾
DC Open Loop Gain ⁽¹¹⁾
Gain Bandwidth Product ⁽¹¹⁾
Slew Rate ⁽¹¹⁾
Output Voltage – High Level
VIN1 > 3.3 V, IOEA = -1.0 mA ^{(11), (12)}
Output Voltage – Low Level
IOEA = -1.0 mA ^{(11), (12)}
Oscillator Ramp ⁽¹¹⁾
OSCILLATOR
R_IN
R_OUT
A_VOL
G_BW
v_SR
V _{EA_OH}
–
500
–
kΩ
–
150
–
Ω
–
80
–
dB
–
35
–
MHz
–
200
–
V/µs
V
–
2.0
–
V _{EA_OL}
–
0.4
V
–
V_SCRamp
–
0.5
–
V
CLKSYN Pin (open) Low Level Output Voltage
IOL = +1.0 mA ⁽¹³⁾
CLKSYN Pin (open) High Level Output Voltage
IOH = -1.0 mA ⁽¹⁴⁾
CLKSYN Pin (grounded) Input Voltage Threshold
CLKSYN Pin Pullup Resistance
Frequency Adjusting Reference Voltage
BOOST REGULATOR
V_{OSC_OL}
V_{OSC_OH}
V_{OSC_IH}
R_PU
V_FREQ
–
V_DDI
- 0.4 V
1.2
60
–
–
–
–
–
1.26
0.4
V
V
–
2.0
V
240
kΩ
–
V
Regulator Output Voltage
IBST = 20 mA, VIN1 = VIN2 = 2.8 V to 6.0 V
V_BST
7.3
Power MOSFET Q5 RDS(ON)⁽¹¹⁾
IBD = 500 mA, T_A = 25°C
R_DS(ON)Q5
–
Regulator Recommended Output Capacitor
C_BST
–
Regulator Recommended Output Capacitor Maximum ESR
ESRC_BST
–
Notes
11. Design information only. This parameter is not production tested.
12. IOEA Refers to Error Amplifier Output Current.
13. IOL Refers to I/O Low Level
14. IOH Refers to I/O High Level
V
7.7
8.3
mΩ
650
1000
10
–
µF
100
–
mΩ
Analog Integrated Circuit Device Data
Freescale Semiconductor
34701
9