LDL212 STMICROELECTRONICS | Alldatasheet
Document overview
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- PDF pages: 28
Technical content
Datasheet sections
- 1 Block diagram
- 2 Pin configuration
- 3 Typical application
- 4 Maximum ratings
- 5 Electrical characteristics
- 6 Typical performance characteristics
- 7 Package information
- 7.1 DFN6 (3x3) package information
- 7.2 DFN6 (3x3) packing information
- 7.3 DFN6 (2x2) package information
- 7.4 DFN6 (2x2) packing information
- 7.5 SO8-batwing package information
- 7.6 SO8-batwing packing information
- 8 Ordering information
- 9 Revision history
Features
Input voltage from 2.5 V to 18 V 20 V AMR Any fixed output voltages, from 1.2 V to 12 V in 100 mV steps (from 1.2 V to 6.6 V in 50 mV steps) available on request Adjustable version from 1.18 V to VIN-VDROP(MAX) Guaranteed output current 1.2 A Typical dropout 350 mV@1.2 A Undervoltage lockout Enable function Internal thermal, current and power limitation High PSRR: 87 dB @ 120 Hz, 75 dB @ 1 kHz Operating temperature range: -40 °C to 125 °C Packages SO-8 batwing plastic micropackage, DFN6 (3x3) and DFN6 (2x2)
Applications
Consumer Industrial SMPS Point-of-load DC-DC post-regulation
Description
The LDL212 provides 1.2 A of maximum current from an input voltage range from 2.5 V to 18 V, with a typical dropout voltage of 350 mV @ 1.2 A. The high power supply rejection ratio of 87 dB at
120 Hz, and more than 40 dB at 100 kHz, makes
the LDL212 suitable for direct regulation in SMPS and secondary linear regulation in DC-DC converters. The LDL212 goes to shutdown mode due to the enable logic control function, reducing the total current consumption. The device also includes the current limit, SOA and thermal protections.
1 Block diagram
Figure 1: Block diagram (fixed) Figure 2: Block diagram (adjustable)
2 Pin configuration
Figure 3: Pin configuration (top view) Table 1: Pin description Pin name Pin number (SO-8) Pin number (DFN6) Description VIN 4 4 Input voltage VOUT 1 3 Output voltage GND 2, 3, 6, 7 1 Ground ADJ/sense 8 2 Feedback pin for adjustable version / VOUT sense (1) on fixed version EN 5 6 Enable pin. The device is in off-state when this pin is pulled low NC - 5 Not connected Notes: (1) The sense pin on the fixed version must be connected to VOUT for proper operation.
LDL212 Typical application
3 Typical application
Figure 4: Typical application circuit (adjustable version) Figure 5: Typical application circuit (fixed version) R1 and R2 are calculated according to the following formula: R1 = R2 x (VOUT/VADJ - 1). The output voltage of the adjustable version can be set from 1.18 V to V IN- VDROP(MAX), where VDROP(MAX) is the maximum dropout voltage, as defined in Table 4: "Electrical characteristics".
4 Maximum ratings
Table 2: Absolute maximum ratings Symbol Parameter Value Unit VIN DC input voltage - 0.3 to 20 V VOUT DC output voltage - 0.3 to VIN + 0.3 V VEN Enable input voltage - 0.3 to VIN + 0.3 V VSENSE Output sense pin voltage - 0.3 to VIN + 0.3 V VADJ ADJ pin voltage - 0.3 to 2 V IOUT Output current Internally limited mA PD Power dissipation Internally limited mW TSTG Storage temperature range - 55 to 150 °C TOP Operating junction temperature range - 40 to 125 °C Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Table 3: Thermal data Symbol Parameter Value Unit SO-8 batwing plastic micropackage Thermal resistance junction-to-case 20 °C/W Thermal resistance junction-to-ambient 55 DFN6 (2x2) Thermal resistance junction-to-case 15 Thermal resistance junction-to-ambient 65 DFN6 (3x3) Thermal resistance junction-to-case 10 Thermal resistance junction-to-ambient 55
5 Electrical characteristics
TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = 1 μF, COUT = 4.7 μF, IOUT = 10 mA, VEN = VIN, unless otherwise specified. a Table 4: Electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. Unit VIN Operating input voltage 2.5 18 V VUVLO Turn-on threshold 2.3 2.4 V Hysteresis 200 mV VOUT VOUT accuracy IOUT = 10 mA -2 2 % TJ = 25 °C IOUT = 10 mA -3 3 % -40 °C < TJ < 125 °C VADJ Adjustable pin voltage VIN = 2.5 V IOUT = 10 mA TJ = 25 °C 1.18 V +2 % VIN = 2.5 V IOUT = 10 mA +3 % IADJ Adjustable pin current VIN = 2.5 V IOUT = 10 mA 20 nA ΔVOUT Line regulation VOUT + 1 V ≤ VIN ≤ 18 V IOUT = 10 mA 0.002 0.01 %/V ΔVOUT Load regulation IOUT = 10 mA to 1.2 A 0.0001 0.0005 %/mA VDROP Dropout voltage (1) IOUT = 1.2 A VOUT > 3 V -40 °C < TJ < 125 °C 350 600 mV eN Output noise voltage
10 Hz to 100 kHz,
IOUT = 100 mA 60 µVRMS/VOUT SVR Supply voltage rejection VIN = VOUT(NOM) + 1 V ± VRIPPLE dB VRIPPLE = 0.5 V, f = 120 Hz VIN = VOUT(NOM) + 1 V ± VRIPPLE 75 VRIPPLE = 0.5 V, f = 1 kHz VIN = VOUT(NOM) + 1 V ± VRIPPLE 50 VRIPPLE = 0.5 V, f = 100 kHz IQ Quiescent current IOUT = 0 mA to 1.2 A -40 °C < TJ < 125 °C 250 380 µA VIN input current in OFF mode 0.3 1.5 a For VOUT(NOM) ≤ 1.5 V, VIN = 2.7 V.
Symbol Parameter Test conditions Min. Typ. Max. Unit VEN = GND VIN = 18 V ISC Short-circuit current RL = 0 1.5 2 A VEN Enable input logic low VIN = 2.5 V to 18 V V Enable input logic high VIN = 2.5 V to 18 V IEN Enable input current 1.5 µA VEN = VIN , VIN = 18 V 16 20 TON Turn-on time (2) 120 µs TSHDN Thermal shutdown 175 °C Hysteresis 25 Notes: (1) Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value. This specification is not valid for output voltages below 2.2 V. (2) Turn-on time is the time measured between the enable input just exceeding VEN high value and the output voltage just reaching 95% of its nominal value.
LDL212 Typical performance characteristics
6 Typical performance characteristics
Figure 6: Output voltage vs temperature (VIN = 2.5 V, VOUT = VADJ, IOUT = 0 mA) Figure 7: Output voltage vs temperature (VIN = 2.5 V, VOUT = VADJ, IOUT = 1200 mA) Figure 8: Output voltage vs temperature (VIN = 6 V, VOUT = 5 V, IOUT = 10 mA) Figure 9: Output voltage vs temperature (VIN = 6 V, VOUT = 5 V, IOUT = 1200 mA) Figure 10: Line regulation vs temperature (VIN = 6 to 18 V, VOUT = 5 V, IOUT = 10 mA ) Figure 11: Line regulation vs temperature (VIN = 2.5 to 18 V, VOUT = VADJ, IOUT = 10 mA)
7 Package information
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK ® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark.
7.1 DFN6 (3x3) package information
Figure 40: DFN6 (3x3) package outline
Table 5: DFN6 (3x3) mechanical data Dim. mm Min. Typ. Max. A 0.80 A1 0 0.02 0.05 0.20 b 0.23 0.45 D 2.90 3 3.10 D2 2.23 2.50 E 2.90 3 3.10 E2 1.50 1.75 e 0.95 L 0.30 0.40 0.50 Figure 41: DFN6 (3x3) recommended footprint
7.2 DFN6 (3x3) packing information
Figure 42: DFN6 (3x3) tape outline 7875978_N
Figure 43: DFN6 (3x3) reel outline Table 6: DFN6 (3x3) tape and reel mechanical data Dim. mm Min. Typ. Max. A0 3.20 3.30 3.40 B0 3.20 3.30 3.40 K0 1 1.10 1.20 7875978_N
7.3 DFN6 (2x2) package information
Figure 44: DFN6 (2x2) package outline 7733060 revE
Table 7: DFN6 (2x2) mechanical data Dim. mm Min. Typ. Max. A 0.70 0.75 0.80 A1 0.00 0.02 0.05 A3 - 0.203 ref - b 0.25 0.30 0.35 D - 2.00 - E - 2.00 - e - 0.50 - D2 0.77 0.92 1.02 E2 1.30 1.45 1.55 K 0.15 - - L 0.20 0.30 0.40 aaa - 0.05 - bbb - 0.10 - ccc - 0.10 - ddd - 0.05 - eee - 0.08 -
Figure 45: DFN6 (2x2) recommended footprint 7733060 revE
7.4 DFN6 (2x2) packing information
Figure 46: DFN6 (2x2) reel outline Table 8: DFN6 (2x2) tape and reel mechanical data Dim. mm Min. Typ. Max. A 180 C 12.8 13.2 D 20.2 N 60 T 14.4 A0 2.4 B0 2.4 K0 1.3 P0 4 P 4
7.5 SO8-batwing package information
Figure 47: SO-8 batwing package outline Table 9: SO-8 batwing mechanical data Dim. mm Min. Typ. Max. A 1.75 A1 0.10 0.25 A2 1.25 b 0.31 0.51 b1 0.28 0.48 c 0.10 0.25 c1 0.10 0.23 D 4.80 4.90 5.00 E 5.80 6.00 6.20 E1 3.80 3.90 4.00 e 1.27 h 0.25 0.50 L 0.40 1.27 L1 1.04 L2 0.25 k 0° 8° ccc 0.10
Figure 48: SO-8 batwing recommended footprint
7.6 SO8-batwing packing information
Figure 49: SO8-batwing tape and reel outline Table 10: SO8-batwing mechanical data Dim. mm Min. Typ. Max. A 330 C 12.8 13.2 D 20.2 N 60 T 22.4 A0 8.1 8.5 B0 5.5 5.9 K0 2.1 2.3 P0 3.9 4.1 P 7.9 8.1
8 Ordering information
Table 11: Order code DFN6 (3x3) DFN6 (2x2) SO-8 batwing plastic micropackage Output voltage (V) LDL212PU12R 1.2 LDL212PU15R 1.5 LDL212PU18R 1.8 LDL212PU25R 2.5 LDL212PU30R 3 LDL212D33R 3.3 LDL212PU50R 5 LDL212PUR LDL212PVR LDL212DR Adjustable
9 Revision history
Table 12: Document revision history Date Revision Changes 02-Mar-2016 1 Initial release. 19-Sep-2016 2 Updated Table 3: "Thermal data" and Section 5: "Electrical characteristics". Minor text changes.