33730_12 Datasheet, PDF (11/28 Pages) Freescale Semiconductor, Inc – Switch Mode Power Supply with Multiple Linear Regulators

ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 6. Dynamic Electrical Characteristics
Characteristics noted under conditions 6.0 V ≤ KA_V_BAT = V_BAT ≤ 26.5 V, -40°C ≤ T_A ≤ 125°C using the typical application
circuit, unless otherwise noted.
Characteristic
Symbol
Min
Typ
Max
Unit
GENERAL
Power On Reset Delay Time (HR Timer) (see Table 8)
(Time to RESET up after Regulator in regulation)
Power On Reset Delay Time (HR Timer) Accuracy (33 k resistor)
Programming Pin Latching Delay⁽¹¹⁾
SWITCHING REGULATOR
t_{D_POR}
ms
0
—
68
8.0
—
12
ms
t_{LD_P}
—
500
—
µs
Oscillator Frequency (Switching Freq.) Range - Adjustable (Figure 4)
Oscillator Frequency Tolerance at 100 kHz (FREQ Pin Open)
SW Node Rise Time, V_BAT = KA_V_BAT = 14 V, I_SW = 500 mA⁽¹¹⁾
SR pin shorted to SW pin
SR pin open
SR pin shorted to BOOT pin
SW Node Fall Time, V_BAT = KA_V_BAT = 14 V, I_SW = 500 mA⁽¹¹⁾
SR pin shorted to SW pin
SR pin open
SR pin shorted to BOOT pin
Notes
11. Guaranteed by design.
Freq
f_TOL
t_{SW_R}
t_{SW_F}
100
—
500
kHz
90
—
110
kHz
V/ns
—
0.96
—
—
1.82
—
—
2.38
—
V/ns
—
0.83
—
—
0.83
—
—
0.83
—
Analog Integrated Circuit Device Data
Freescale Semiconductor
33730
11