DRV8808 Datasheet, PDF (7/38 Pages) Texas Instruments – COMBINATION MOTOR DRIVER WITH DC-DC CONVERTER

DRV8808
www.ti.com
SLVS857A – DECEMBER 2009 – REVISED AUGUST 2011
ELECTRICAL CHARACTERISTICS (continued)
T_J = 0°C to 135°C, V_M = 7 V to 38 V (unless otherwise noted)
PARAMETER
TEST CONDITIONS
t_start
Start-up time
V3p3 Output
V_3p3
Output voltage⁽³⁾
C_bypass
Output capacitor
Internal Clock OSCi
C_Storage = 0.1 μF,
V_M ≥ 15 V
f_OSCi
System clock rrequency
CSELECT for DC-DC Startup Selection
V_CS0
dc-dc all off
V_CS1
Turn ON ODB
V_CS2
Turn ON ODB then ODC
VLDO Regulator ^(4)(5)(6)
Pull down by external 200-kΩ resistor
As pin open
VLDO_IN
VLDO_FB
VLDO_OUT
I_OUT
I_OCP
t_Ideg
V_ovp
LDO input voltage
Feedback voltage
Output voltage range
Load capability
OCP current
OCP deglitch
Overvoltage protection
1 V ≤ VLDO_OUT ≤ 1.8 V
1.8 V ≤ VLDO_OUT ≤ 2.5 V
% to nominal Voutx detected at VFB
(VFB increasing)
V_uvp
Undervoltage protection
% to nominal Voutx detected at VFB
(VFB decreasing)
t_Vdeg
UVP/OVP deglitch time
C_L1
C_ESR1
Load bypass configuration 1
C_C1
C_L2
C_ESR2
Load bypass configuration 2
C_C2
Three, DC-DC Converter
Electrolytic load capacitance
ESR of load capacitance
Ceramic load capacitance
Electrolytic load capacitance
ESR of load capacitance
Ceramic load capacitance
V_{M OPE_X}
Operating supply voltage range I_O < 0.6 A
ratio to V_OUT
Vth _VM- < V_M < 7 V
20 V < V_M < 38 V
ODx
FBx
I_{O ODx}
I_{O ODx2}
Regulator output voltage
FBx pin voltage
Output current (DC)
Output current (DC) at low V_M
20 V < V_M < 40 V
0℃ < T_J < 125℃
125℃ < T_J < 135℃
6.5 V < V_M < 20 V
V_M = 7 V, V_O = 5.5 V
V_M = 7 V, V_O = 1 V 0℃ < T_J < 125℃
125℃ < T_J < 135℃
Vth_VM- < V_M < 6.5 V , V_O ≤ 3.3 V
V_M > 15 V
V_M = 7 V, V_O = 5.5 V
MIN
TYP MAX UNIT
0.5
2 ms
3
3.3
3.6
V
0.08
0.1
10
μF
5.76
6.4 7.04 MHz
0
0.3
V
1.3
2
V
3
3.6
V
3
3.6
V
1
V
±5
%
±3
500 mA
725 1100 mA
3
8
13
μs
25
30
35
%
–25
–30
–35
%
3
8
13
μs
27
120
μF
0.05
2
Ω
0
0.4 μF
80
100
120
μF
0.05
0.2
Ω
0
3
μF
0.8 x
V
V_M
0.9 x
V_M
-3
V_O
3
%
-4
V_O
4
-5
V_O
5
-5
V_O
5
-3
V_O
3
-4
V_O
4
-5
V_O
5
1
V
1.35
A
0.6
A
(3) V3p3 bypass pin is not meant to be used as a supply.
(4) LDO can be bypassed by either load configuration 1 or 2.
(5) Typical values for external components should be chosen such that when the tolerance is added to the typical, the values remain
between the maximum and minimum specifications listed.
(6) When LDO is not used, recommend connecting VLDO_IN to GND, VLDO_OUT to GND, and VLDO_FB to FB_B.
Copyright © 2009–2011, Texas Instruments Incorporated
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