MC33063A-Q1_15 Datasheet, PDF (5/26 Pages) Texas Instruments – MC33063A-Q1 1.5-A Peak Boost, Buck, Inverting Switching Regulator

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MC33063A-Q1
SLLS654C – APRIL 2005 – REVISED DECEMBER 2014
6.5 Oscillator Characteristics
V_CC = 5 V, T_A = full operating range (unless otherwise noted) (see block diagram)
PARAMETER
TEST CONDITIONS
f_osc
I_chg
I_dischg
I_dischg/I_chg
V_Ipk
Oscillator frequency
Charge current
Discharge current
Discharge-to-charge current ratio
Current-limit sense voltage
V_PIN5 = 0 V, C_T = 1 nF
V_CC = 5 V to 40 V
V_CC = 5 V to 40 V
V_PIN7 = V_CC
I_dischg = I_chg
T_A
25°C
25°C
25°C
25°C
25°C
MIN TYP MAX UNIT
24
33
42 kHz
24
35
42 μA
140 220 260 μA
5.2 6.5 7.5
250 300 350 mV
6.6 Output Switch Characteristics⁽¹⁾
V_CC = 5 V, T_A = full operating range (unless otherwise noted). See the Functional Block Diagram.
PARAMETER
TEST CONDITIONS
T_A
MIN
V_CE(sat)
Saturation voltage –
Darlington connection
I_SW = 1 A, pins 1 and 8 connected
Full range
TYP MAX UNIT
1 1.3 V
V_CE(sat)
Saturation voltage –
non-Darlington connection⁽²⁾
I_SW = 1 A, R_PIN8 = 82 Ω to V_CC,
Forced β ~ 20
Full range
0.45 0.7 V
h_FE
I_C(off)
DC current gain
Collector off-state current
I_SW = 1 A, V_CE = 5 V
V_CE = 40 V
25°C
Full range
50
75
0.01
100 μA
(1) Low duty-cycle pulse testing is used to maintain junction temperature as close to ambient temperature as possible.
(2) In the non-Darlington configuration, if the output switch is driven into hard saturation at low switch currents (≤300 mA) and high driver
currents (≥30 mA), it may take up to 2 μs for the switch to come out of saturation. This condition effectively shortens the off time at
frequencies ≥30 kHz, becoming magnified as temperature increases. The following output drive condition is recommended in the non-
Darlington configuration:
Forced β of output switch = I_C,SW / (I_C,driver – 7 mA) ≥ 10, where ∼7 mA is required by the 100-Ω resistor in the emitter of the driver to
forward bias the V_be of the switch.
6.7 Comparator Characteristics
V_CC = 5 V, T_A = full operating range (unless otherwise noted). See the Functional Block Diagram.
PARAMETER
TEST CONDITIONS
T_A
MIN
V_th
Threshold voltage
25°C
1.225
Full range 1.21
ΔV_th Threshold-voltage line regulation
I_IB
Input bias current
V_CC = 5 V to 40 V
V_IN = 0 V
Full range
Full range
TYP MAX UNIT
1.25 1.275
V
1.29
1.4
5 mV
–20 –400 nA
6.8 Total Device Characteristics
V_CC = 5 V, T_A = full operating range (unless otherwise noted). See the Functional Block Diagram.
PARAMETER
TEST CONDITIONS
T_A
I_CC
Supply current
V_CC = 5 V to 40 V, C_T = 1 nF,
V_PIN7 = V_CC, V_PIN5 > V_th,
V_PIN2 = GND, All other pins open
Full range
MIN MAX UNIT
4 mA
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